IP UPDATE
Exploring the Latest in Intellectual Property Law
IP UPDATE
Exploring the Latest in Intellectual Property Law
US Court of Appeals for the Federal Circuit
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Old Dawg, New Tricks: Bankruptcy Successor Is Also Inter Partes Re-Exam Successor

by | Feb 18, 2021 |

Reversing the Patent Trial and Appeal Board, the US Court of Appeals for the Federal Circuit concluded that because a plaintiff was a successor in bankruptcy, it was a successor in an inter partes re-examination. The Court held that the plaintiff should be substituted for the original requestor following the sale of the original re-examination requestor’s right, title and interest in, to and under its assets to a holding company, which further assigned such assets and interests to the plaintiff. Mojave Desert Holdings, LLC v. Crocs, Inc., Case No. 20-1167 (Fed. Cir. Feb. 11, 2021) (Dyk, J.)

The dispute originated in 2012 when Crocs sued Dawgs for patent infringement. Dawgs responded by filing a third-party request for inter partes re-examination, which the US Patent & Trademark Office granted. The examiner rejected Crocs’ challenged patent claim as anticipated, and Crocs appealed to the Board.

While the appeal was pending, Dawgs filed a petition under chapter 11 of the Bankruptcy Code. Dawgs moved the bankruptcy court to approve the sale of all of its assets to a recently formed entity, Dawgs Holdings, free and clear of all liens, claims and encumbrances pursuant to Bankruptcy Code. The relevant provision of the Asset Purchase Agreement assigned Dawgs Holdings:

[a]ll of [Dawgs’] right, title and interest in, to and under all of the assets, properties and rights of every kind and nature, whether real, personal or mixed, tangible or intangible (including intellectual property and goodwill) . . . .

The sale order carved out from the free and clear language “any Claims [Crocs] . . . may hold for patent infringement occurring post-Closing.” Shortly after the closing, Dawgs Holdings assigned all rights, including explicitly the claims asserted by Dawgs in the district court action and the inter partes re-examination, to Mojave.

Months later, Mojave moved the Board to change the real party-in-interest from Dawgs to Mojave. The Board dismissed and expunged the request because:

  • The sale from Dawgs to Dawgs Holdings was silent with respect to the inter partes re-examination.
  • Mojave was not a party to the inter partes re-examination proceeding.
  • Mojave did not have standing to update the real party-in-interest.
  • Mojave did not file its submission within 20 days of any change of the real party-in-interest as required by 37 CFR § 41.8(a).

Subsequently, the Board reversed the examiner’s rejection of Crocs’ patent claim, which decision Dawgs appealed to the Federal Circuit, while simultaneously filing a motion to substitute Mojave.

In granting the substitution motion, the Federal Circuit noted the broad language describing the sale of all of Dawgs’ assets to Dawgs Holdings. The Court distinguished the sale language from the sale language in other cases where a buyer in bankruptcy may only acquire “substantially all” of the assets of another entity. Because the language describing the transfer from Dawgs to Dawgs Holdings was so broad, the Federal Circuit concluded that the transfer from Dawgs Holdings to Mojave included the interests in Dawgs’ claims and its successor-in-interest requestor status in the inter [...]

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Patent Extension Requires Board or Court Reversal, Multiple Examiner Actions Not Enough

by | Feb 18, 2021 |

The US Court of Appeals for the Federal Circuit affirmed a grant of summary judgment for the Director of the US Patent and Trademark Office (PTO), holding that the statutory language authorizing so-called “C-delay” patent term adjustment requires an adverse patentability finding that is reversed by a court or the Patent Trial & Appeal Board. Chudik v. Hirshfeld, Case No. 20-1833 (Fed. Cir. Feb. 8, 2021) (Taranto, J.) C-delay adds to a patent’s term to account for delay experienced during appellate review of an adverse patentability finding. C-delay does not apply when the examiner reopens examination after final rejection (in this case, four times over an 11-year period) because appellate review is not triggered when an examiner, and not the Board or a court, undoes a final unpatentability decision by reopening examination.

Chudik filed a patent application, and the examiner rejected all pending claims as unpatentable. Chudik declined to appeal, instead filing a request for continued examination. Over the next eight years, the examiner issued four more final rejections. After each rejection, Chudik filed a notice of appeal and opening brief, and after each notice of appeal, the examiner reopened prosecution rather than answering the appeal. The patent finally issued more than 11 years after Chudik filed the application. The PTO added time to the term of the patent for A-delay (where the PTO fails to meet certain prescribed deadlines) and B-delay (each day that the patent application’s pendency extends beyond three years), but not C-delay.

The C-delay provision of the Patent Act provides for a patent term adjustment where the delay is due to “appellate review by the [Board] or by a Federal Court in a case in which the patent was issued under a decision in the review reversing an adverse determination of patentability.” Chudik challenged the PTO’s calculation of the patent extension, arguing that he was entitled to C-delay patent term adjustment for the time his four notices of appeal were pending in the PTO. Chudik argued that the C-delay provision’s “appellate review” included the examiner’s decision to undo her final action through a reopening of prosecution. The PTO rejected that argument, concluding that the C-delay provision did not apply because the Board’s jurisdiction over the appeals never attached and no Board or reviewing court reversed an adverse determination of patentability.

Chudik then sued the PTO director in federal district court, again arguing that “appellate review” referred to the Board’s entire review process, starting when the notice of appeal is filed. Chudik also argued that “a decision in the review reversing an adverse determination of patentability” covered an examiner’s own decision, through a reopening of prosecution. Although characterizing it as “based on a reasonable construction of statutory text,” the court rejected Chudik’s challenge. Applying Chevron, the district court held that the PTO’s position must be affirmed because that position was reasonable. Chudik appealed to the Federal Circuit.

The Federal Circuit affirmed the district court’s decision, finding that the PTO’s interpretation of the C-delay provision’s statutory language was [...]

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Stick to the Fax: Conflicting Statements Made During Prosecution Lead to Indefiniteness

by | Feb 18, 2021 |

In deciding whether use of the term “passive link” to define a connection between a computer terminal and a fax machine rendered a patent claim indefinite, the US Court of Appeals for the Federal Circuit affirmed the district court’s finding of invalidity based on conflicting statements made by the patent owner during prosecution. Infinity Computer Products, Inc. v. Oki Data Americas, Inc., Case No. 20-1189 (Fed. Cir. Feb. 10, 2021) (Prost, C.J.)

Infinity owns a patent directed to providing a circuit for interfacing a personal computer with a facsimile machine to enable the facsimile to be used as a scanner or a printer for a personal computer. The patent seeks to accomplish all of the objectives of a scanner or a printer in a simple, straightforward manner through the use of a circuit of highly simplified design and low cost. The patent claims recite that this functionality is accomplished “through a bi-directional direct connection via a passive link between the facsimile machine and the computer.” Infinity asserted the patent against Oki in district court.

The term “passive link” does not appear in the patent specification. Infinity introduced this term during prosecution to overcome rejections based on a prior art patent to Perkins. During prosecution, Infinity unsuccessfully argued that unlike Perkins, the claimed invention permits uninterrupted transfer of signals between the facsimile and the computer without the use of intervening circuitry. Infinity engaged in multiple rounds of amendment and response with the examiner before finally overcoming the rejections based on Perkins by arguing that the invention “creates a passive link between the facsimile machine and the computer [and] therefore does not require any intervening apparatus as does Perkins.” Perkins used a modem, characterized by Infinity as the “intervening apparatus,” internal to the computer. Infinity argued that the modem “should be regarded as a peripheral device to the computer which processes data before it is transmitted to the I/O bus of the computer,” effectively drawing the boundary of the “passive link” at the I/O bus of the computer.

After allowance, the patent was the subject of three ex parte re-examination proceedings. The patent was a continuation-in-part of a parent application, and in order to overcome a prior art reference asserted in the re-examination proceeding, Infinity argued that the claimed “passive link” element was entitled to the priority date of an earlier parent application. Infinity specifically noted that the patent’s description of “the RJ11 telephone cable and use thereof in communicating data between the fax machine 30 and the PC computer 40 meets the definition of ‘passive link.'” In doing so, Infinity pointed to certain figures in the parent application specification that disclosed fax modem circuitry internal to the computer, effectively drawing the boundary of the “passive link” at the computer’s external port—before the I/O bus.

The district court found that there was a discrepancy on the boundary of the “passive link” because during prosecution it was defined as at the I/O bus of the computer, but during the ex parte re-examination it [...]

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If You Seek or Browse and Can Find, It’s Publicly Available, but Anticipation Isn’t Obvious and Requires Notice

by | Feb 11, 2021 | ,

The US Court of Appeals for the Federal Circuit found that facilitating browsing of documents on a website was sufficient to support public accessibility of prior art references, but that the Patent Trial and Appeal Board cannot sua sponte invalidate a claim as anticipated under § 102 unless that specific statutory ground had previously been noticed. M & K Holdings, Inc. v. Samsung Electronics Co., Ltd., Case No. 20-1160 (Fed. Cir. Feb. 1, 2021) (Bryson, J.)

In response to M & K Holdings’ suit for patent infringement, Samsung filed an inter partes review (IPR) petition seeking cancellation of all claims of the asserted patent as obvious. The patent is directed to an efficient method for compressing video files by “decoding a moving picture in inter prediction mode,” using a motion vector to quantify where “reference pictures are used to estimate motion of a current block” over the video duration. Samsung’s petition relied on references generated in connection with the Joint Collaborative Team on Video Coding (JCT-VC), which established industry standards for high-efficiency video coding (HEVC). All three prior art references were uploaded to JCT-VC’s website before the critical date.

After the Board held all claims of the patent unpatentable, M & K appealed, arguing that the Board erred by relying on references that do not qualify as prior art printed publications under 35 USC § 102, and by finding claim 3 anticipated when the petition for IPR asserted only obviousness as to that claim.

Public Accessibility and Printed Publications

M & K argued that a person of ordinary skill could not have located two of the three prior art references by exercising reasonable diligence, and therefore the Board’s holding that those references were publicly accessible was erroneous. Specifically, M & K argued that the structure and search capabilities of the JCT-VC website (requiring navigating to the JCT-VC landing page, clicking on the “All meetings” link and selecting a particular meeting in order to access documents, without any explanation that the “All meetings” label contains a document repository, and with no search functionality on the landing page or the “All meetings” page) meant that even if a user happened to navigate to a meeting page of the website, the user could not search documents by content, but could search only by date, title and number.

The Federal Circuit disagreed, explaining that public accessibility does not require a website’s landing page to have search functionality. Instead, “given the prominence of JCT-VC, the dispositive question is whether interested users of the JCT-VC website could have located [the references] through reasonable diligence.” The Court agreed that substantial evidence supported that interested users could have done so.

Regardless of whether the website described itself as a document repository, the Federal Circuit noted that a skilled artisan browsing the JCT-VC website would understand that it was structured to serve the JCT-VC’s purpose of developing HEVC standards through member meetings and communications. Therefore, a skilled artisan browsing the JCT-VC website would have realized that documents are hosted [...]

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Eight-Month Delay on Transfer Motion Ruling Is “Egregious,” Warrants Stay

by | Feb 11, 2021 |

The US Court of Appeals for the Federal Circuit issued a rare grant of a mandamus petition directing a district court to stay proceedings until ruling on a pending motion to transfer, stating that the district court’s eight-month delay in ruling on the motion while allowing substantive issues to proceed “amounted to egregious delay and blatant disregard for precedent.” In re SK hynix Inc., Case No. 21-113 (Fed. Cir. Feb. 1, 2021) (Moore, J.) (non-precedential). The district court denied the transfer request the following day, and the petitioner asked the Federal Circuit to again stay the proceedings until it completed briefing on a new mandamus petition to compel transfer, which the Federal Circuit denied without prejudice. In re SK hynix Inc., Case No. 21-113 (Fed. Cir. Feb. 3, 2021).

Netlist and SK hynix are competitors in the memory semiconductor space. Netlist sued SK hynix for patent infringement in the US District Court for the Western District of Texas. SK hynix moved to transfer the case to the US District Court for the Central District of California. The parties completed briefing on the transfer motion in May 2020. The district court ordered the parties to engage in extensive discovery and scheduled a Markman hearing for March 2021. On January 6, 2021, after SK hynix moved to stay proceedings pending the motion to transfer, the district court instructed the parties to proceed with all deadlines while jurisdictional issues were resolved in parallel. SK hynix then filed the mandamus petition seeking to direct the district court to transfer the case, or alternatively, to rule on SK hynix’s pending motion to transfer. The district court soon issued an order setting a hearing on the transfer motion for February 2, 2021.

On February 1, 2021, the Federal Circuit granted the mandamus petition and directed the district court to stay all proceedings concerning the substantive issues in the case, including discovery, until the district court issued a ruling on the transfer motion. In its Order, the Court recognized that mandamus may be used to correct an “arbitrary refusal to act” by a district court on a transfer request. Although a district court has discretion in handling its docket, a motion to transfer “should unquestionably take top priority.” The Court characterized the district court’s handling of the transfer motion as amounting to “egregious delay and blatant disregard for precedent,” finding that the motion “lingered unnecessarily on the docket” while the parties were instructed to proceed with the merits of the case.

The next day, the district court issued an order denying SK hynix’s transfer request. The district court’s order also moved up the trial date from December 6, 2021, to July 6, 2021, and the Markman hearing from March 19, 2021, to March 1, 2021. SK hynix immediately notified the Federal Circuit of the denial and its intention to file a new mandamus petition to compel transfer. In the interim, SK hynix requested that the Federal Circuit extend the stay of the district court proceedings until briefing [...]

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Reprints Do Not Change Earlier Publication Date

by | Dec 10, 2020 |

Addressing the entirety of the evidence standard, the US Court of Appeals for the Federal Circuit affirmed a Patent Trial and Appeal Board finding that responsive evidence can be properly considered to demonstrate the public availability of a reference relied upon in an inter partes review (IPR) petition. VidStream LLC v. Twitter, Inc., Case Nos. 19-1734, -1735 (Fed. Cir. Nov. 25, 2020) (Newman, J.)

Youtoo Technologies sued Twitter for infringement of a patent directed to recording and publishing content on social media websites. In response, Twitter filed two IPR petitions challenging the asserted patent claims as obvious. The IPR petitions relied on a textbook (Bradford) as a primary reference in both petitions. Bradford was first published in 2011, but the copy provided with the petitions indicated a reprint date of 2015. The Board granted the IPR petitions and ultimately found all claims unpatentable over combinations of art including Bradford. VidStream, which emerged as the patent owner after Youtoo went through bankruptcy proceedings, appealed.

VidStream argued that the Board erred in accepting and considering evidence that Twitter provided for the first time with its replies, instead of considering only the documents that Twitter filed with its original petitions. Specifically, Twitter filed with its replies a copy of the US Copyright Office Certificate of Registration stating that Bradford’s date of first publication was November 8, 2011; a Library of Congress copy of Bradford; and a declaration by Twitter counsel that he had compared the excerpts of Bradford that were submitted with the petition with the same pages in the 2011 Library of Congress copy of Bradford and found them “identical.” VidStream stated that the Bradford pages filed with Twitter’s petitions were published December 13, 2015, and thus argued that Twitter did not show that these pages were available before the patent’s 2012 priority date. VidStream maintained that the Board erred in considering Bradford in the obviousness combinations.

The Federal Circuit noted that VidStream had challenged the proper priority date of Bradford before the Board and had also filed a motion to exclude Bradford as improper evidence. The Board denied VidStream’s motion to exclude, finding that it was appropriate to permit Twitter to respond to VidStream’s challenge by providing additional evidence to establish the Bradford publication date. In line with its 2018 Nobel Biocare Servs. AG v. Instraden USA Inc. and Anacor Pharm. decisions, the Court found that the responsive evidence supported the Board’s finding that Bradford was published and publicly accessible before the patent’s priority date. Like the Board, the Court considered the entirety of the evidence relevant to a determination of printed publication. For example, the ISBNs of the 2011 and the 2015 printings of Bradford were the same, and a Machine-Readable Cataloging record had been created for Bradford in August 2011. Bradford was also printed by an established publisher, and the internet archive included an Amazon webpage for Bradford, further confirming that Bradford was publicly accessible in 2011 and that interested persons could access and order the book in [...]

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Making Waves: Post-Employment Contract Assignment Provision Invalid Under California Law

by | Dec 3, 2020 |

The US Court of Appeals for the Federal Circuit invoked “precedents that are relevant but not directly on point” to examine when employment contract provisions may require assignment of inventions conceived post-employment and without use of the former employer’s confidential information, finding that an intellectual property assignment provision in the employer’s predecessor’s employment agreement was void under California law. Whitewater West Industries, Ltd. v. Richard Alleshouse, et al., Case No. 19-1852 (Fed. Cir. Nov. 19, 2020) (Taranto, J.)

Richard Alleshouse began working for Wave Loch in 2007 as an engineer in the field of large-scale sheet-wave water attractions, which are surf and wave simulators sometimes seen on cruise ships and in water parks. Alleshouse’s many duties for the company included the inspection, assessment and improvement of the company’s wave rides; the development of new rides; and product management of the company’s branded FlowRider sheet wave attraction.

After almost five years with the company, Alleshouse consulted with a lawyer, Yong Yeh, regarding the scope of his employment agreement with Wave Loch, which included intellectual property assignment terms that survived termination of the employment agreement. Following that consultation, Alleshouse and Yeh discussed the idea of starting their own company to design sheet-wave attractions. In August 2012, Alleshouse resigned from Wave Loch, and in October 2012, Alleshouse and Yeh filed provisional patent applications that resulted in three different US patents describing and claiming certain “water attractions involving a flowing body of water on a surface” and “nozzle shapes and configurations which create a flowing body of water over a surface.”

In 2017, Whitewater West Industries, the successor to Wave Loch, sued Alleshouse, Yeh and their new company, Pacific Surf Design, in federal district court in California, asserting claims for breach of contract and correction of inventorship. In particular, Whitewater sought an assignment of the three patents under the terms of Alleshouse’s employment contract with Wave Loch, and claimed that Yeh was improperly listed as an inventor on each of the three patents. The district court ruled for Whitewater and found that the intellectual property assignment provision in Alleshouse’s employment agreement was valid and thus breached due to the failure to assign the patent rights at issue. Alleshouse appealed.

Alleshouse challenged the employment agreement’s intellectual property assignment provision as invalid under California Labor Code § 16600, which prohibits any contract provision that restrains a person from a lawful profession, trade or business, and under § 2870(a), which prohibits requiring an employee to assign over any invention that an employee developed entirely on her own time without using the employer’s equipment, supplies, facilities or trade secret information (with certain enumerated exceptions for employee inventions related to the employer’s business or the employee’s work for the business). The parties agreed on two factual points that were important to the Federal Circuit’s analysis on appeal: that the inventions at issue were not conceived until after Alleshouse left his job at Wave Loch, and that Alleshouse did not use any trade secret or confidential information belonging to Wave [...]

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Covered Business Method Threshold Review Is Not Appealable

by | Nov 24, 2020 | ,

The US Court of Appeals for the Federal Circuit found that in view of the Supreme Court of the United States’ 2019 decision in Thryv v. Click-to-Call, the Patent Trial and Appeal Board’s threshold determination that a patent qualifies for covered business method (CBM) review is closely tied to the institution decision and is therefore not appealable. SIPCO, LLC v. Emerson Electric Co., Case No. 18-1635 (Fed. Cir. Nov. 17, 2020) (Chen, J.)

SIPCO owns a patent directed to a communication device that uses a two-step communications path, where a remote device first communicates through a low-power wireless connection to an intermediate node, which in turn connects to a central location. Emerson filed a CBM petition arguing that the claims were obvious over the prior art. The Board instituted a CBM review and issued a final written decision finding the challenged claims obvious over the prior art. SIPCO appealed.

SIPCO argued that the Board overstepped its authority to institute a CBM review because the patent was directed to a “technological invention” and was statutorily excluded from CBM review. The Federal Circuit initially found that the Board’s threshold analysis was flawed because it focused solely on the second portion of the “technological invention” definition set forth in 37 CFR § 42.301(b). The Court vacated the Board’s decision and remanded for it to consider both parts of the definition, and to reconsider whether the patent qualified for CBM review (IP Update, Vol. 22, No. 20).

Emerson filed a petition for a writ of certiorari in the Supreme Court, arguing that the Board’s decision to institute a CBM review is not appealable under the “no appeal” provision of 35 USC § 324(e). The Supreme Court granted the petition, vacated the Federal Circuit opinion and remanded for further consideration in light of the Supreme Court’s decision in Thryv, which found that the one-year time bar for instituting an inter partes review is bound up with the decision to institute and therefore is not appealable under a similar “no appeal” provision.

On remand, the Federal Circuit found that Thryv made clear that the Board’s threshold determination as to whether a patent qualifies for CBM review is a decision that is non-appealable. Availability of the CBM review process is conditioned on whether the patent qualifies for CBM review, and patents that are directed to “technological inventions” are excluded from CBM review. The Court concluded that the determination of whether a patent qualifies for CBM review is inextricably tied to the decision to institute and is thus not appealable. Turning to the merits, the Court found the Board’s claim construction correct and its obviousness determination supported by substantial evidence.

Practice Note: In a footnote, the Federal Circuit recognized that Thryv implicitly abrogated the Court’s prior practice of reviewing whether the Board’s institution determination breached the limits of the Board’s authority.



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Wave Goodbye to Lost Arguments: Waiver Versus Forfeiture Law

by | Nov 24, 2020 | ,

The US Court of Appeals for the Federal Circuit concluded that a patent owner forfeited claim construction arguments on appeal by not presenting them first to the Patent Trial and Appeal Board for consideration. In re: Google Tech. Holdings LLC, Case No. 19-1828 (Fed. Cir. Nov. 13, 2020) (Chen, J.)

Google submitted an application to the US Patent and Trademark Office (PTO) seeking patent claims covering certain means and methods for transferring content to video-on-demand systems. During examination, the examiner rejected Google’s proposed claims based on obviousness in light of certain references. After receiving a final rejection, Google appealed to the Board, relying heavily on block quotes from the references and proposed claims to argue that the examiner improperly found obviousness.

The Board affirmed the examiner’s rejection. Applying the broadest reasonable interpretation standard, the Board construed two claim terms: “costs” and “network impact.” In defining those terms, the Board noted that Google had not, in the course of appealing the examiner’s decision, “cited to a definition of ‘costs’ or ‘network impact’ in the [s]pecification that would preclude the [e]xaminer’s broader reading.” Google appealed.

Google argued that the Board erred in its constructions. The Federal Circuit never reached the merits, however, instead concluding that Google had not properly presented its arguments first to the PTO. The Court described the oft-forgotten difference between waiver (the voluntary and knowing relinquishment of a right) and forfeiture (the failure to make a timely assertion of a particular right). This case, the Court reasoned, was an example of forfeiture, because Google had failed to urge the claim constructions to the PTO in the first instance.

Google contended that the Federal Circuit should nonetheless review the Board’s determination, because the Board actually ruled on the claim constructions and those issues were ripe for decision before the Court. The Court rejected these arguments, largely because Google identified no excuse for failing to raise the issue earlier, and because the Board’s final decision was not unexpected in the course of the proceedings.

Practice Note: Ultimately, the Court’s opinion presents one approach (perhaps not one consistently followed) regarding what an appellant must do in order to maintain its right to review. Appellees seeking to foreclose appellate review should consider whether, regardless of the Board’s ultimate decision, the appellant appropriately pressed the arguments on the error for which it later seeks appellate review.



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Summary Judgment Foreclosed when There Is More than One Possible Inference from Evidence

by | Nov 19, 2020 |

Reversing a summary judgment ruling that barred a correction of inventorship claim, the US Court of Appeals for the Federal Circuit, found issues of material fact foreclosed summary judgment and warned that where an issue is a “quintessentially fact-laden one” such as equitable issue involving possible equitable estoppel on inventorship, summary judgement is likely not appropriate.. Ferring B.V. et al. v. Allergan, Inc. et al., Case No. 20-1098 (Fed. Cir. Nov. 10, 2020) (O’Malley, J.)

From 1998 to 2002, Dr. Seymour Fein worked as a consultant for Ferring Pharmaceuticals to develop a drug that helps regulate the body’s retention of water. That work apparently did not include any obligation by Fein to assign any inventions. As a result, both Ferring and Fein ultimately filed dueling patent applications directed to aspects of the drug and its use. In correspondence that took place while patent prosecution was pending, Fein indicated to Ferring that his application would be directed to a low dose administration route for the drug. Ferring responded that it believed that aspect (i.e., the low dose route) to be disclosed by prior art. Both sides eventually obtained patents, and Fein assigned his patents to Allergan.

In 2012, Ferring filed a state court action for correction of inventorship, seeking to add its researchers to Fein’s patents. Allergan counterclaimed with its own inventorship claim seeking to add Fein to Ferring’s patents, and also asserted an equitable estoppel defense based on the above-noted correspondence between the parties that occurred during patent prosecution. Allergan then moved for summary judgment on its equitable estoppel defense, which was granted. The judge subsequently held a bench trial and rejected Allergan’s inventorship claim. Ferring appealed the summary judgment decision.

On appeal, the Federal Circuit rejected Ferring’s argument that the trial court should not have considered any conduct that preceded issuance of the patents for purposes of equitable estoppel. However, the Federal Circuit held that the trial court’s summary judgment decision had improperly resolved issues of material fact regarding that pre-issuance conduct. According to the Federal Circuit, the pre-issuance discussions did not lead to only one possible inference, but rather were subject to interpretation because the claim scope discussed (low dose administration) did not necessarily match the claim scope ultimately granted. As a result, the Federal Circuit vacated the summary judgment decision and remanded to the district court.



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