IP UPDATE
Exploring the latest in intellectual property law
IP UPDATE
Exploring the latest in intellectual property law
Patent Trial & Appeal Board
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Amending a Range? Better Enable It

by | Jul 13, 2023 |

In a post-grant review appeal, the US Court of Appeals for the Federal Circuit explained that patent claims reciting a range must enable the full scope of that range and, under the Administrative Procedure Act (APA), the Patent Trial & Appeal Board is not bound to decisions rendered in a Preliminary Guidance. Medytox, Inc. v. Galderma S.A., Case No. 22-1165 (Fed. Cir. June 27, 2023) (Dyk, Reyna, Stark, JJ.)

Medytox owns a patent directed to the use of animal-protein-free botulinum toxins with long-lasting effects. Galderma challenged the validity of Medytox’s patent in a post-grant review. In response to the challenge, Medytox filed a motion to amend the patent under the Board’s Pilot Program, which allows a petitioner to amend the patent claims and receive a preliminary decision as to whether the amendment would preserve the patent’s validity (Preliminary Guidance). Medytox proposed modifying the claims so that they only encompassed treatment methods that possessed a patient response rate of “50% or greater.” Galderma opposed the motion, arguing that claiming a 50% to 100% response rate constituted new matter, meaning the claim language improperly claimed an invention that was not described in the patent application as filed.

The Board issued a Preliminary Guidance construing the new claim language and explaining that it did not believe that Medytox’s amended claims represented new matter. According to the Board, the new limitation did not “necessarily” claim a range of 50% to 100% and instead could just be claiming 50% or greater. The Board explained that since the patent contained the concept of a greater than 50% response rate, claiming that rate was not new matter. As a consequence of the Board’s positive reception, Medytox amended all the claims to include the new language. Galderma once again opposed the motion and further argued that the amended claims were not enabled. The Board held an oral hearing and questioned the parties on the proper construction of the “50% or greater” claim language.

In its final written decision, the Board decided that the limitation was a range of 50% to 100%, contrary to its statement in the Preliminary Guidance. Because the claimed limitation was a range, the Board—citing the Supreme Court’s 2023 decision in Amgen v. Sanofi and the Federal Circuit’s 2012 decision in Magsil v. Hitachi Global Storage—explained that the entire range must be enabled. The patent, however, only described a response rate of up to 62%, so the Board found that the claimed range was not enabled. Medytox appealed.

Medytox alleged three errors. First, Medytox argued that the Board’s new construction was wrong. Second, Medytox argued that the claims were enabled. Finally, Medytox argued that the Board violated the APA by capriciously departing from its Preliminary Guidance. The Federal Circuit rejected Medytox’s arguments and affirmed the Board’s decision.

First, the Federal Circuit determined that there was no meaningful difference between the two possible constructions—claiming a response rate greater than 50% was essentially the same as claiming a response rate of [...]

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First Rule of the PTAB? Play by the Rules

by | Jun 22, 2023 |

The US Court of Appeals for the Federal Circuit affirmed two Patent Trial & Appeal Board decisions holding the challenged claims unpatentable as obvious, even though the Board declined to consider evidence of antedating and found that the claims lacked written description support. Parus Holdings, Inc. v. Google LLC, Case Nos. 22-1269; -1270 (Fed. Cir. June 12, 2023) (Lourie, Bryson, Reyna, JJ.)

Parus Holdings owns two patents related to an interactive voice system to request information from a voice web browser. Google (among others) petitioned for inter partes review (IPR) of the patents.

During the IPR proceedings, the Board found that a publication (Kovatch) was prior art to the challenged patents. In reaching that decision, the Board declined to consider Parus’s arguments and evidence of an earlier conception and reduction to practice because they were only presented via incorporation by reference in violation of 37 C.F.R. § 42.6(a)(3). The Board ruled that Parus failed to meet its burden of production on antedating.

The Board also found that the publication of the application to which Parus’s challenged patents claimed priority (Kurganov-262) was prior art because the common specification failed to provide written description support for the challenged claims. Parus appealed the Board’s decision, raising two main arguments.

First, Parus contended that the Board erred when it declined to consider Parus’s arguments and evidence on antedating. Parus argued that § 42.6(a)(3)’s prohibition on incorporation by reference did not warrant the Board’s decision because Parus, as patent owner, need not have submitted a response at all. Parus also argued that the Federal Circuit’s 2017 decision in Aqua Products mandates that the Board consider all record evidence, regardless of the manner of presentation. The Federal Circuit rejected Parus’s arguments in turn.

Regarding Parus’s violation of the incorporation by reference rule, the Federal Circuit explained that Parus had assumed an affirmative burden of production when it chose to submit a response to antedate Kovatch. Along with that burden came other responsibilities, such as complying with the US Patent & Trademark Office’s (PTO) rules and regulations, including § 42.6(a)(3). The Court further explained that this burden of production could not be met without some combination of citing evidence with specificity and explaining the significance of the cited material. Parus did neither.

The Federal Circuit also rejected Parus’s argument that the Board is required by law to review all evidence in the record. The Court clarified that, while its Aqua Products holding requires the Board to decide all issues properly before it, nothing in Aqua Products requires the Board to review evidence or issues not introduced or introduced in violation of the Board’s rules. As the Court noted, “[t]he burden of production cannot be met simply by throwing mountains of evidence at the Board without explanation or identification of the relevant portions of that evidence. One cannot reasonably expect the Board to sift through hundreds of documents, thousands of pages, to find the relevant facts.”

Parus also argued that the Board exceeded its statutory authority under 35 U.S.C. [...]

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Under High Pressure: New Mechanism of Action Can’t Save Drug Administration Claims

by | Jun 22, 2023 |

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board ruling that method claims reciting a mechanism of action triggered by the co-administration of two known antihypertensive agents were obvious over the cited prior art. In re Couvaras, Case No. 22-1489 (Fed. Cir. June 14, 2023) (Lourie, Dyk, Stoll, JJ.)

This case arose out of applicant John Couvaras’s prosecution of patent claims reciting a method of increasing prostacyclin release in the systemic blood vessels to improve vasodilation in a human with essential hypertension by co-administering two therapeutic agents. During prosecution, Couvaras conceded that the two claimed therapeutic agents had been known as essential hypertension treatments for many decades. The examiner agreed, citing 10 references as confirmation. The examiner further found that the physiological results of co-administering the two therapeutic agents were not patentable because they naturally flowed from the claimed administration of the known antihypertensive agents.

Couvaras appealed to the Board, arguing that the increased prostacyclin release was unexpected and that objective indicia overcame any existing prima facie case of obviousness. The Board disagreed, ruling that the increased prostacyclin release was inherent in the obvious administration of the two known antihypertensive agents and that no evidence existed to support a finding of any objective indicia. Couvaras appealed.

Couvaras raised three arguments on appeal:

  1. The Board erred in affirming that a skilled artisan would have had motivation to combine the art.
  2. The claimed mechanism of action was unexpected, and the Board erred in discounting its patentable weight by deeming it inherent in the claimed method.
  3. The Board erred in weighing objective indicia of non-obviousness.

With respect to motivation to combine, the Federal Circuit agreed with the Board that the art supplied sufficient motivation to combine because the claimed therapeutic agents were known for decades to treat hypertension, finding the Board’s conclusion supported by substantial evidence. The Court found that Couvaras had forfeited a related argument for no reasonable expectation of success by failing to first raise that challenge to the Board.

The Federal Circuit also rejected Couvaras’s argument that the claimed mechanism of action was unexpected and therefore entitled to patentable weight. Couvaras argued that the Board downgraded the patentable weight of limitations drawn to the antihypertensive agents’ mechanism of action by deeming them to be merely inherent. According to Couvaras, even if the recited mechanism of action was inherent in the claimed administration of the two agents, that mechanism was unexpected because the increased prostacyclin release was unexpected and could not be dismissed as having no patentable weight due to inherency.

The Federal Circuit disagreed, explaining that Couvaras was attempting to claim a mechanism of action that naturally flows from the co-administration of two known antihypertensive agents and that “[n]ewly discovered results of known processes directed to the same purpose are not patentable because such results are inherent.” The Court allowed that while mechanisms of action may not always meet the most rigid standards for inherency, “[r]eciting the mechanism for known compounds [...]

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The Best Option Is Obviously Not the Only Option

by | Jun 22, 2023 |

Following a jury verdict finding infringement of two patents and awarding $2.2 billion, the Patent Trial & Appeal Board issued a final written decision finding all claims in one of the asserted patents invalid. The Board explained that an asserted prior art combination only needs to be a suitable option, not the best option. Patent Quality Assurance, LLC v. VLSI Tech. LLC, Case No. IPR2021-01229 (June 13, 2023) (Giannetti, McNamara, Melvin, APJs).

In March 2021, a jury found that Intel infringed two patents owned by VLSI. On July 7, 2021, Patent Quality Assurance filed an inter partes review petition against all claims of one of the patents Intel was found to infringe. The Board instituted review. After institution, Intel filed an identical petition and motion for joinder, both of which were granted.

The challenged patent is directed to a method of determining the minimum operating voltage for integrated-circuit memory, storing the value of that voltage in nonvolatile memory, and using the value to determine when an alternative power-supply voltage may be switched to the memory to ensure that the minimum operating voltage is met. Intel challenged the claims of the patent based primarily on a combination of three prior art references.

VLSI raised numerous arguments for why the combination of prior art references did not teach the claimed invention. VLSI argued that a skilled artisan would not have had reason to regulate the power supply voltage of one reference with the voltage regulator of another. VLSI asserted that there would have been no need to use the switching mechanism if voltage regulation was available from the outset. The Board disagreed and quoted the US Court of Appeals for the Federal Circuit’s 2022 decision in Intel v. Qualcomm, which stated that “a petitioner is required to show only that there is something in the prior art as a whole to suggest the desirability of making the combination, not whether there is something in the prior art as a whole to suggest that the combination is the most desirable combination available.”

The Board reiterated this theme in response to another of VLSI’s arguments. VLSI contended that a person of skill in the art would not have combined the prior art disclosure of a system for determining minimum operating voltages and storing them in nonvolatile memory with a reference that uses SRAM, a type of volatile memory commonly used as an alternative to nonvolatile memory. The Board again noted that “there is no requirement that an asserted combination is the best option, only that it be a suitable option.”

Given the jury’s verdict and damages award in the district court case, VLSI also argued that the jury’s verdict showed commercial success and was objective indicia of nonobviousness. As part of its analysis, the Board reiterated that the nexus between the alleged commercial success and the asserted patent claims must be both embodied by the commercial product and coextensive with them. The Board went on to find that “the record before [the Board] does [...]

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Absent Nexus Secondary Considerations Come in Second

by and | Jun 15, 2023 |

Addressing the nexus between a secondary consideration and the claimed invention in assessing obviousness, the US Court of Appeals for the Federal Circuit reversed a Patent Trial & Appeal Board finding of nonobviousness because the Board erred in its nexus analysis regarding secondary considerations. Yita LLC v. MacNeil IP LLC, Case Nos. 22-1373; -1374 (Fed. Cir. June 6, 2023) (Taranto, Chen, Stoll, JJ.)

Yita petitioned for inter partes review (IPR) of all claims of two patents. The patents share a common specification and cover vehicle floor trays that are theraformed from a polymer sheet of substantially uniform thickness. These trays (illustrated below) were designed to closely conform to the walls of the vehicle foot well so that the trays would stay in place once installed.

The Board found that the claims of one of the patents were not obvious even though an artisan would have been motivated to combine the prior art asserted (which disclosed the “close conformance” limitation) and would have had a reasonable expectation of success because the evidence of secondary considerations was overpowering and included a nexus between the evidence of success and the patented invention. The Board also found that the claims of the other patent were not obvious because the “1/8 inch limitation” regarding the thickness of the foot well was not disclosed in the prior art. The Board declined to consider Yita’s argument, which was raised for the first time in its reply brief. Yita appealed.

Yita argued that the Board committed a legal error in its analysis of the secondary consideration evidence for the first patent and abused its discretion by not considering the argument Yita raised in its reply brief regarding the other patent.

On the secondary considerations issue, the Federal Circuit explained that the Board erred in finding a nexus between the secondary consideration evidence of success and the claimed invention because the Board exclusively related to a feature that was well-known in the prior art (i.e., the close conformance between the tray and the vehicle floor). The Court explained that where the prior art teaches a well-known feature and an artisan would have been motivated to combine such prior art with an expectation of success, any secondary consideration that is exclusively related to the well-known feature will not rescue the claim from obviousness. The Court noted that while secondary considerations can be linked to an individual element of the claimed invention or to an inventive combination of elements, here the Board relied on secondary consideration evidence that was related entirely to the already well-known close conformance of the tray and vehicle floor.

The Federal Circuit next addressed Yita’s argument that the Board should have considered an argument raised in Yita’s reply brief regarding the 1/8-inch limitation. Yita failed to raise the argument that it would have been obvious to modify a prior art reference to arrive at the “1/8 inch limitation” [...]

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District Court Finding Doesn’t Preclude PTAB Proceeding

by | Jun 15, 2023 | ,

The Patent Trial & Appeal Board refused to terminate an inter partes review (IPR) proceeding, finding that collateral estoppel and claim preclusion do not apply to previous findings from a district court proceeding. Patent Quality Assurance, LLC v. VLSI Technology LLC, IPR2021-01229, Paper No. 128 (PTAB June 3, 2023) (Melvin, Giannetti, McNamara, APJs).

Patent Quality Assurance filed a petition for IPR on July 7, 2021, against a patent owned by VLSI. The Board granted institution. The Board later instituted on a substantively identical petition filed by Intel and granted Intel’s motion for joinder to add Intel to the Patent Quality Assurance IPR proceeding. Prior to the July 7, 2021, petition, litigation between VLSI and Intel resulted in a jury verdict that Intel infringed certain claims of the challenged patent. Invalidity was not presented to the jury. On May 10, 2022, the district court entered final judgment, including a finding that Intel had not proven invalidity. Based on the district court’s judgment, VLSI asserted that claim preclusion barred Intel from challenging validity of the asserted patent in IPR and sought termination of the IPR as to Intel.

VLSI argued that the elements of claim preclusion were met because both VLSI and Intel were parties to both cases, the district court entered a final judgment for infringement and no finding of invalidity, and the effect of Intel’s IPR was to collaterally attack the final judgment in the first case. Intel responded, arguing that claim preclusion does not apply to IPRs from the district court under the America Invents Act (AIA).

The Board agreed with Intel that estoppel did not apply. Intel argued that if Congress had intended for IPRs to be precluded by claims in a parallel district court, it would have identified that as one of the estoppel circumstances in the AIA. VLSI argued that the Supreme Court’s 1991 decision in Astoria Federal sav. & Loan Ass’n v. Solimino applies only when an agency decision precludes a later court decision and, therefore, common-law claim preclusion would apply to the IPR proceeding barring a plain statement from Congress showing intent to overcome preclusion.

The Board disagreed, noting that the cited case law related to statutes where a later statute superseded the earlier one and required a clear and manifest intent to repeal the earlier statute. The Board found that there was no express intent to repeal the earlier statute regarding estoppel, and the jurisprudence constantly counsels against repeal “by implication.” The Board also crucially noted that there was no statutory conflict between the earlier and later statutes, and the question, therefore, was whether (under Astoria) the AIA showed congressional intent that common-law claim preclusion should apply to IPRs.

Reading 35 U.S.C. § 315(e), the codification of the AIA’s estoppel provision, the Board noted that the statute clearly imposes estoppel on future agency and district proceedings but says nothing about applying adjudications in district court proceedings at the Board. As the Board explained, there would be no reason for § 315(e) to spell [...]

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Obviously Prima Facie Case Overcome by Secondary Considerations

by | Jun 15, 2023 |

The US Court of Appeals for the Federal Circuit affirmed the Patent Trial & Appeal Board, holding that the Board did not err in finding certain challenged claims nonobvious and not unpatentable based on a showing of several objective criteria of nonobviousness and a nexus of the evidence to a commercial product embodying the claimed invention. Medtronic, Inc. v. Teleflex Innovations S.A.R.L., Case No. 21-2357 (Fed. Cir. June 05, 2023) (Moore, C.J.; Lourie, Dyk, JJ.) and Medtronic, Inc. v. Teleflex Innovations S.A.R.L., Case No. 21-2359 (Fed. Cir. June 05, 2023) (Moore, C.J.; Lourie, Dyk, JJ.)

Teleflex developed and patented a novel catheter-based stenosis intervention system that successfully mitigated long-standing risks intrinsic to existing catheter-based intervention systems, in particular damage to the coronary artery from guide catheter dislodgement or a catheter’s distal tip (i.e., the end of the catheter farthest from the insertion site). The preferred embodiments incorporated into Teleflex’s extremely successful GuideLiner products comprised a proximal substantially rigid portion (yellow), a reinforced portion (blue) and a distal flexible tip (pink), as illustrated below.

The catheters were sized so they could be inserted through standard guide catheters and thus were coined guide extension catheters. This innovative nesting feature increased guide catheter backup support while the guide extension catheter’s soft distal end was less likely to cause tissue damage once deeply inserted into patients. Teleflex’s guide extension catheters also were optimized for receiving interventional cardiological devices. This optimized function was a combination of the catheter’s coaxial lumen, that lumen’s diameter being no more than one French (i.e., 1/3 mm) less than the diameter of the guide catheter, and a proximal side opening that featured a double incline design like that illustrated above.

Teleflex’s GuideLiner was introduced in 2009 and enjoyed “undisputed commercial success and industry praise.” In 2019, Medtronic introduced its competing guide extension catheter (Telescope) and filed six inter partes review (IPR) petitions against Teleflex’s extension guide catheter family. Three of Medtronic’s petitions asserted that the challenged claims in three of Teleflex’s patents were obvious over the evacuation sheath assembly with a distal side opening used to aspirate embolic material while occluding blood flow using sealing balloons disclosed in a prior art reference (Ressemann). The other three petitions challenged claims of the other Teleflex patents as being obvious over a support catheter for delivering angioplasty balloons disclosed in a prior art reference (Kontos).

Medtronic specifically asserted that the following three elements of Teleflex’s claimed catheters were obvious:

  1. A proximal side opening. Medtronic argued that it would have been obvious to replace the proximal funnel structure of Kontos’s support catheter with the distal side opening of Ressemann’s evacuation sheath assembly.
  2. A catheter diameter that is no more than one French less than a corresponding guide catheter. Medtronic argued that in view of prior art mother-and-child dual catheter systems in which the child catheter’s diameter is no more [...]

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Neither Narrow Proposed Claim Construction nor Work Product Claim Justify Withholding Material Factual Information

by and | Jun 1, 2023 |

The Patent Trial & Appeal Board of the US Patent & Trademark Office (PTO) canceled all challenged claims across five patents because the patent owner failed to meet its duty of candor by selectively and improperly withholding material information that was inconsistent with its patentability arguments. Spectrum Solutions, LLC v. Longhorn Vaccines & Diagnostics, LLC, IPR2021-00847; -00850; -00854; -00857; -00860 (PTAB May 3, 2023) (Braden, Yang, Derrick, Pollock, APJs) (per curiam) (Braden, APJ concurring).

The Board instituted inter partes reviews (IPRs) against five Longhorn patents based on petitions filed by Spectrum. During the proceedings, Longhorn filed motions to amend, after which the Board issued preliminary guidance suggesting that Spectrum established a reasonable likelihood that the proposed substitute claims were unpatentable. Longhorn engaged Assured Bio Labs (ABL) to conduct biological testing that would support its arguments distinguishing a prior art reference, but Longhorn made attorney work product objections in Spectrum’s ABL depositions and withheld testing data inconsistent with its arguments on the patentability of the original and proposed substitute claims. The Board subsequently allowed additional questioning on certain ABL testing, after which Spectrum filed a motion for sanctions, requesting judgment against Longhorn, a finding that the prior art reference taught the claim limitations and precluding Longhorn from contesting the finding, and an award to Spectrum of compensatory expenses, including attorneys’ fees.

The Board determined that sanctions of adverse judgment as to all challenged claims was appropriate because Longhorn failed to meet its duty of candor and good faith. The Board explained that parties have a duty of candor and good faith before the Board that requires any factual contentions to be well supported by evidence. Parties have “a duty to disclose to the [PTO] all information known . . . to be material to patentability.” (37 C.F.R. §1.56(a).) Information is material to patentability when it is “not cumulative to information already of record or being made of record in the application and . . . it refutes, or is inconsistent with, a position the applicant takes in . . . asserting an argument of patentability.” Taking a position contrary to any known fact while shielding factual information from the Board violates the duty of candor and good faith to the PTO, even if the party may otherwise withhold the information as being immaterial to patentability or privileged.

The Board criticized Longhorn’s proposed claim constructions as too narrow and contrary to the express language in both the original and proposed substitute claims. The Board explained that although Longhorn was free to maintain arguments grounded on Longhorn’s claim constructions, that did not excuse Longhorn’s duty of candor and good faith dealing, including disclosing material information relating to the Board’s preliminary claim constructions. Longhorn could not “simply withhold information” that the PTO would find material to patentability and should instead contest the Board’s constructions at trial.

The Board also explained that Longhorn took an overly strict view of what was material to claim patentability and a lax view as to the duty of candor [...]

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Pending Appeal Does Not Divest Board of Statutory Authority to Institute IPRs

by | May 18, 2023 | ,

In a case involving sua sponte review, the Director of the US Patent & Trademark Office (PTO) vacated an inter partes review (IPR) decision denying institution, found that the Patent Trial & Appeal Board had statutory authority to institute IPR review of a claim that had been previously found invalid by a district court under 35 U.S.C. § 101 (but under appeal), and remanded the proceeding for the Board to consider whether discretionary denial was appropriate. Volvo Penta of the Americas, LLC v. Brunswick Corp., IPR2022-01366, -01367, -01368, -01369, -01424 (PTO May 2, 2023) (Vidal, Dir.).

Brunswick owns several patents related to marine vessels. Volvo filed IPR petitions challenging the patents, which the Board ultimately denied. Prior to the Board’s decision, the District Court for the Eastern District of Virginia determined that claim 1 in each of the challenged patents was directed to patent-ineligible subject matter and thus was invalid under § 101. In denying institution, the Board concluded that it lacked authority to institute the IPRs because the challenged claims were no longer in effect and the America Invents Act (AIA) only permits a petitioner to challenge a claim, noting that “when given its plain and ordinary meaning, § 311(b) provides that only claims that are in effect may be annulled.” Although Brunswick appealed the district court’s decision, the Board determined that the challenged claims were finally adjudicated. Thus, the Board lacked authority to institute the requested IPR. The Board also determined that the multi-factor Fintiv analysis for discretionary denial under 35 U.S.C. § 214(a) was inapplicable here in view of the district court’s invalidity finding.

The Director reviewed the Board’s decision sua sponte and vacated the Board’s institution decision with instructions to analyze Fintiv factors 1 through 5 in view of the parallel district court proceeding.

The Director first addressed the Board’s § 311(b) analysis. The Director concluded that in finding the district court’s invalidity determination to be a final adjudication, the Board appeared to have borrowed from collateral estoppel principles. The Director found, however, that these principles do not apply to § 311(b) nor was there any assertion that Volvo was collaterally estopped from pursuing IPRs. The Director also determined that the challenged claims were not fully adjudicated since the district court’s decision was subject to further judicial review. Thus, the Director found that the Board had statutory authority to institute the IPRs.

Next, the Director addressed the Board’s Fintiv analysis, finding that the Board improperly interpreted Fintiv as limited to its exercise of discretion in the context of ongoing parallel district court litigation where final judgment has not yet been entered. The Director explained that the Fintiv analysis applied where, as here, the claims remain subject to further review on appeal. The Director instructed the Board to evaluate the Fintiv factors on remand and instructed that if the Board determines that these factors favor discretion to deny institution, the Board should then consider whether the case on the merits is compelling (consistent with the
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Hanging Patentability on Written Description Cannot Be Truss-ted

by | May 4, 2023 |

The US Court of Appeals for the Federal Circuit upheld a Patent Trial & Appeal Board finding that the claims of a patent for a truss hanger were invalid for lack of written description because they claimed an undisclosed range despite the predictable nature of the technology. Columbia Insurance Company v. Simpson Strong-Tie Company Inc., Case Nos. 21-2145; -2157 (Fed. Cir. Mar. 31, 2023) (Prost, Hughes, JJ.) (Moore, C.J., dissenting) (non-precedential).

Truss hangers secure support beams to wall frames in buildings. These hangers normally accommodate layers of fire-resistant sheathing by cutting out the sheathing that overlaps with the hanger, but this can reduce fire resistance. Columbia owns a patent claiming a truss hanger that extends through the sheathing and does not decrease fire resistance. The extension for the sheathing, illustrated below, must be “sized large enough to permit two layers of ⅝ inch thick sheathing to be received between the rear edge plane and the back flange plane, but too small to permit three layers of ⅝ inch thick sheathing to be received.”

Simpson petitioned for a post-grant review of the patent at the Board. That proceeding resulted in a mixed decision. The Board found in favor of Simpson that certain original claims and certain substitute claims of the patent were unpatentable for lack of written description and that certain claims were obvious over the prior art. However, it found in favor of Columbia with regard to one claim. Both parties appealed.

The Federal Circuit affirmed the Board’s findings regarding written description. The claimed extension portion covered a range of extension sizes between the upper limit (three layers of five-eighths-inch-thick sheathing) and lower limit (two layers of five-eighths-inch-thick sheathing). The Court affirmed the Board’s finding that nothing in the specification covered the claimed upper limit. Columbia argued that a skilled artisan would read the claims to cover exactly two layers of five-eighths-inch-thick sheathing, but the Court found that this claim construction argument was forfeited because it was raised for the first time on appeal and, even if it weren’t, it was incorrect because it was akin to rewriting the claims.

The Federal Circuit also affirmed the Board’s finding that certain claims were obvious, concluding that the Board’s determination was supported by substantial evidence. The Court rejected Columbia’s argument that the Board’s claim construction violated the Administrative Procedure Act because the construction adopted by the Board was similar enough to Simpson’s proposed construction and not raised sua sponte.

Finally, the Federal Circuit affirmed the Board’s finding that the claim on which Simpson appealed was not indefinite because the term “large enough to permit the drywall to be received” informs a skilled artisan with reasonable certainty that the scope of this claim includes any extension portion sized larger than the smallest commonly known sheathing size. The Court also found that the claim was not obvious because the Board correctly interpreted the claim [...]

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