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Authentication approved: § 314(d) doesn’t bar review of IPR petition scope

by | Dec 18, 2025 |

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board inter partes review (IPR) decision, finding that:

  • § 314(d) does not bar review of an IPR petition’s scope.
  • Substantial evidence supported the Board’s findings that the prior art taught the disputed limitations.
  • The Board correctly distinguished similar but different claim elements.

International Business Machines Corp. v. Zillow Group, Inc., Case Nos. 24-1170; -1274 (Fed. Cir. Dec. 9, 2025) (Chen, Taranto, Stoll, JJ.)

IBM holds a patent related to systems and methods for single sign-on (SSO) operations, enabling users to create and access multiple accounts using a single set of login credentials. Rakuten petitioned for IPR, asserting an anticipation challenge under § 102 and three obviousness challenges under § 103. The Board instituted review and addressed three claim limitations central to the dispute.

The Board first addressed the “protected resources” limitation. It adopted IBM’s construction requiring URLs or URIs and ultimately found the anticipation challenge unmet, but not because Sunada prior art failed to disclose the limitation. Instead, Rakuten (the original IPR petitioner) expressly abandoned its § 102 anticipation ground at oral argument, and afterward the Board found that Rakuten had not carried its burden. However, the Board agreed that a prior art reference nonetheless satisfied the limitation because the Board concluded that a skilled artisan would understand Sunada’s express disclosure that “web applications” be identified by conventional URLs or URIs.

Next, the Board construed “identifier associated with the user” to mean information that uniquely identifies a user, adopting IBM’s preferred construction. The Board found that the prior art reference disclosed this limitation through its use of a “User ID.”

Finally, the Board determined that Rakuten failed to establish that the asserted prior art taught the limitation requiring the second system to send a request message to a first system “in response to a determination” during user account creation. The prior art disclosed sending such a request only to the user’s own computer (not to the first system) when additional user information was needed.

The Board held several challenged claims unpatentable and others not unpatentable based on the asserted prior art. IBM appealed regarding all the claims the Board found unpatentable, contending that the Board’s analysis of “protected resources” relied on a theory of patentability not raised in the reward company’s petition, and that the Board’s findings on “identifier associated with the user” lacked substantial evidence. Zillow cross-appealed with respect to all claims the Board held not unpatentable, arguing that the Board’s findings lacked substantial evidence.

The Federal Circuit affirmed the Board on both appeals. First, responding to Zillow’s reviewability challenge, the Court held that § 314(d) did not bar review of whether the Board stayed within the petition’s grounds. The Court explained that while institution decisions are unreviewable, courts routinely examine whether the final written decision relies on theories actually presented in the petition. Zillow argued that because IBM’s challenge was “closely tied” to the Board’s institution decision, § 314(d)’s bar on [...]

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Institution decisions off limits: Federal Circuit rejects mandamus petitions based on due process, “settled expectations”

by | Dec 18, 2025 |

The US Court of Appeals for the Federal Circuit denied mandamus relief to three petitioners after the United States Patent and Trademark Office (USPTO) denied inter partes review (IPR) institution. The Court explained that Congress insulated the Director’s discretion from judicial review by making IPR institution determinations final and nonappealable, and that 35 U.S.C. § 314(d) bars virtually all judicial oversight. In re Cambridge Industries USA Inc., Case No. 2026-101; In re Sandisk Technologies, Inc., Case No. 2025-152; In re HighLevel, Inc., Case No. 2025-148 (Fed. Cir. Dec. 9, 2025) (nonprecedential) (Prost, Chen Hughes, JJ.)

The Federal Circuit acknowledged that while “colorable constitutional claims” may present an exception to the no judicial review clause, no such claims were raised in these cases. The petitioners failed to identify the kind of property interests or retroactivity concerns that could support either a colorable due process claim or an alternative avenue for relief.

Settled expectations

The lead case, In re Cambridge Industries USA, addressed the USPTO’s use of the “settled expectations” factor as a basis for discretionary denial. The agency denied institution on two patents that had been in force for seven and nine years, respectively, concluding that the patent owner had developed “settled expectations” in those long-standing rights. The companion petition, In re Sandisk Tech., involved patents that had been in force for nine and 12 years, and the USPTO reached the same conclusion.

The Federal Circuit declined to disturb either decision. The Court held that the petitioners had not shown that the settled expectations factor exceeded the USPTO’s statutory authority or that the agency’s application of the factor was unreasonable. It also rejected the argument that the USPTO had effectively created a “maximum-patent-age cap” on institution. Emphasizing the narrow scope of mandamus review, the Court reiterated that it was not deciding whether the USPTO’s actions were correct or statutorily permissible, but only that the petitioners failed to establish a “clear and indisputable right” to relief in light of Congress’s limits on judicial review of institution decisions.

Efficiency

In HighLevel, a district court had already found the challenged patents ineligible under 35 U.S.C. § 101. The Patent Trial & Appeal Board nonetheless denied IPR institution, determining that instituting review would not be an efficient use of agency or party resources and that the “efficiency and integrity of the patent system” were best served by declining review. The USPTO denied Director review.

The Federal Circuit rejected HighLevel’s contention that this decision violated due process, holding that HighLevel’s “mere reliance on the PTO evaluating its petition without regard to efficiency concerns arising from parallel litigation” was insufficient to establish a colorable constitutional claim.



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Vague definitions deflate tire trade secret claims

by | Dec 18, 2025 | ,

The US Court of Appeals for the Federal Circuit affirmed a district court’s judgment as a matter of law (JMOL) that the plaintiff failed to prove misappropriation of five alleged trade secrets related to self-inflating tire (SIT) technology and separately rejected the plaintiff’s claim for correction of inventorship of defendant’s patent related to the alleged trade secrets. Coda Dev. S.R.O., et al. v. Goodyear Tire & Rubber Co., et al., Case No. 23-1880 (Fed. Cir. Dec. 8, 2025) (Lourie, Dyk, Cunningham, JJ.)

Coda sued Goodyear in the Northern District of Ohio, alleging that Goodyear misappropriated trade secrets disclosed during SIT-technology collaboration discussions and that Coda’s founder should be added as an inventor on Goodyear’s patent related to the same technology. A jury initially found for Coda on five trade secrets (TS 7, 11, 20, 23, and 24) and awarded more than $64 million in compensatory and punitive damages. The district court, however, granted Goodyear JMOL, holding that the asserted trade secrets were insufficiently definite, not secret, and/or never used or disclosed by Goodyear. It later denied Coda’s inventorship claim of a Goodyear patent related to the alleged trade secrets after a bench proceeding. Coda appealed.

Trade secret claims

TS 24 concerned the “optimal” pump location in a tire sidewall above the rim. The Federal Circuit found that Coda had already disclosed this placement in a 2007 PCT application and a 2008 Tire Technology article, both of which discussed pump placement in the sidewall. At trial, Coda confirmed that these publications described the same location. The Federal Circuit determined that because the information was public, it could not be a trade secret.

Coda’s attempt to narrow TS 24 post hoc by adding qualifiers such as “conventional tire sidewall” failed because those limitations did not appear in Coda’s interrogatory responses in compliance with the district court’s order to provide “a complete list of the trade secrets (with particularity).” The Federal Circuit rejected Coda’s attempt to belatedly introduce additional specificity into the trade secret based on trial testimony and attorney arguments.

The Federal Circuit similarly affirmed that TS 7, 11, and 20 (which described broad categories of SIT system components and functions) failed the definiteness requirement. Each trade secret identified a list of desired features but did not specify the underlying “design and development” knowledge Coda claimed to own. Without a concrete articulation of the claimed technical know-how, the Court found that the descriptions were too vague to distinguish trade secret information from general design concepts already known in the field.

TS 23 comprised a set of pump-pressure test results. At trial, Coda offered only a single 2009 email that mentioned one of the pressure values listed in TS 23. The Federal Circuit found that this partial overlap could not sustain a verdict of “use,” particularly when no evidence showed Goodyear had received or relied on the totality of the testing data. The Court also found that Coda’s arguments about Goodyear proceeding with its SIT project after the email failed to establish a [...]

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From genus to subgenus: When written description and enablement demand more

by | Dec 11, 2025 |

The US Court of Appeals for the Federal Circuit reversed a district court’s denial of a motion for judgment as a matter of law (JMOL), finding that the patent specification failed to provide an adequate written description to practice the full scope of the claimed invention. Seagen Inc. v. Daiichi Sankyo Co., Ltd., Case Nos. 2023-2424; 2024-1176 (Fed. Cir. Dec. 2, 2025) (Lourie, Reyna, Chen, JJ.)

In 2020, Seagen sued Daiichi for infringing its patent covering antibody-drug-conjugates (ADCs). The patent claims priority to a 2004 application that broadly describes ADCs. The application lists 83 possible amino acids and includes more than 47 million possible tetrapeptide combinations. A Texas jury sided with Seagen, finding that Daiichi willfully infringed at least one claim, and awarded more than $41 million in damages plus an 8% running royalty. The district court denied Daiichi’s post-trial motion for JMOL and entered final judgment. Daiichi appealed.

Daiichi argued that no reasonable jury could have found that the 2004 application provided an adequate written description that would enable a skilled artisan to make and use the full scope of the claimed treatment. The Federal Circuit agreed, finding that the 2004 application did not provide written description support for a narrow Gly/Phe-only tetrapeptide subgenus. The application disclosed an enormous genus (approximately 47 million potential tetrapeptides derived from 83 amino acids) without identifying or singling out any tetrapeptide composed exclusively of Gly and Phe. The Court found that the mere appearance of Gly and Phe somewhere within the large list of amino acids was insufficient. The Court determined that Seagen’s claimed 81-member subgenus was merely an infinitesimal fraction of the millions of encompassed species, and that nothing in the 2004 disclosure singled out or directed a skilled artisan toward the Gly/Phe-only species claimed in the patent. Testimony from the named inventors also confirmed that, as of the application’s priority date, they had never contemplated a treatment using only the 81 tetrapeptides later claimed in the patent.

The Federal Circuit also found that the patent did not enable a skilled artisan to make and use the full scope of the claimed ADCs without undue experimentation. The district court had construed “D is a drug moiety” to encompass any drug, and the claims required that the drug be intracellularly cleaved in a patient. Together, these elements defined an extraordinarily broad genus of ADCs: any drug moiety paired with the required intracellular cleavage.

The specification, however, did not identify any common structural features predictive of intracellular cleavage across all possible drug-linker-antibody combinations. Instead, the evidence showed that ADC behavior was highly unpredictable, and scientists had to conduct assays to determine whether a given ADC satisfied the functional limitation.

Under long-standing Federal Circuit precedent where a patent disclosure requires researchers to conduct the undue experimentation doctrine, it does not satisfy the written description requirement. Because skilled artisans would need to evaluate enormous numbers of ADC permutations to determine whether they achieved the claimed intracellular cleavage, the patent failed the enablement requirement.



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IPR estoppel doesn’t extend to ongoing ex parte reexamination

by | Dec 11, 2025 |

The US Court of Appeals for the Federal Circuit affirmed a decision by the Patent Trial & Appeal Board, concluding that inter partes review (IPR) estoppel under 35 U.S.C. § 315(e)(1) does not apply to ongoing ex parte reexamination proceedings and that the Board may retain jurisdiction over a patent even after its expiration. In re Gesture Tech. Partners, LLC, Case No. 25-1075 (Fed. Cir. Dec. 1, 2025) (Lourie, Bryson, Chen, JJ.)

Gesture Technology owns a patent covering methods and apparatus for rapid TV camera and computer-based sensing of objects and human input for applications such as handheld devices, automotive systems, and video games. Samsung requested ex parte reexamination, which the United States Patent & Trademark Office (USPTO) granted.

While the ex parte reexamination was pending, Unified Patents, an organization that includes Samsung as a member, filed two IPR petitions. After the Board issued a final written decisions on the IPRs, Gesture Technology petitioned to terminate the ex parte reexamination, asserting that Samsung was estopped under 35 U.S.C. §315(e)(1) from “maintain[ing] a proceeding” at the USPTO challenging the patent on grounds it could have raised in the IPRs. The USPTO denied the petition, concluding that the estoppel provision does not apply to continuing ex parte reexamination proceedings.

Gesture Technology appealed both IPR final written decisions where the Board invalidated all but two claims. In the ex parte reexamination, the examiner rejected the two remaining claims as anticipated by Liebermann, a patent directed to an electronic communication system designed for deaf individuals that enables real-time interaction using sign language and speech translation. The Board affirmed. Gesture Technology appealed.

Gesture Technology argued that:

  • Estoppel under 35 U.S.C. §315(e)(1) should bar the reexamination because Samsung had previously participated in an IPR.
  • The Board had no jurisdiction because the patent expired.
  • The Board erred in finding anticipation based on Liebermann.

The Federal Circuit rejected Gesture Technology’s estoppel argument, explaining that § 315(e)(1) applies to an IPR “petitioner” maintaining a proceeding before the USPTO. In contrast, under 35 U.S.C. § 305, the USPTO – not the requester – maintains an ex parte reexamination. Thus, estoppel does not bar ongoing ex parte reexamination proceedings.

Gesture Technology argued that Liebermann did not correlate information with a function of the apparatus because its sending function was always selected. The Federal Circuit disagreed, finding substantial evidence that Liebermann disclosed a transmitter/receiver device with a camera performing initial image processing and transmitting processed data. Liebermann’s description of reducing images to pertinent data and sending that data to a processing center supported the conclusion that its device correlated image information with a transmission function, satisfying the claim limitations.

Finally, the Federal Circuit concluded that the Board retains jurisdiction over ex parte reexaminations even after patent expiration. Patent owners maintain rights such as the ability to sue for past damages, creating a live case or controversy that an ex parte reexamination can resolve.

Practice note: Ex parte reexamination remains a viable tool for challengers even after an IPR concludes because estoppel [...]

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From ‘best’ to bust: Multiple methods to determine “optimal/best” render claims indefinite

by | Dec 4, 2025 |

The US Court of Appeals for the Federal Circuit affirmed a district court’s judgment of invalidity and grant of summary judgment of noninfringement, concluding that even if excluded portions of expert testimony were considered, the judgments would remain proper. Akamai Technologies, Inc. v. MediaPointe, Inc., AMHC, Inc., Case No. 24-1571 (Fed. Cir. Nov. 25, 2025) (Taranto, Stoll, Cunningham, JJ.)

AMHC owns two patents that address systems and methods for efficiently routing streamed media content over the internet using an “intelligent distribution network” that centrally manages requests for streamed media from geographically dispersed users to mitigate bandwidth problems inherent in transmitting large volumes of data. Akamai sued AMHC and its subsidiary MediaPointe (collectively, MediaPointe) seeking a declaratory judgment of noninfringement for both patents. MediaPointe counterclaimed for infringement of both patents, after which Akamai counterclaimed for declaratory judgment of invalidity of all claims of both patents.

At the claim construction stage, the district court determined that claim limitations using “optimal/best” language were invalid for indefiniteness because the specification failed to provide a procedure or boundaries to determine what is “optimal/best.” For the remaining asserted claims, the district court granted summary judgment of noninfringement. In doing so, the district court:

  • Excluded as untimely presented key portions of MediaPointe’s technical expert’s testimony, without which MediaPointe could not reasonably establish infringement
  • Ruled that even if the testimony was considered, the record entitled Akamai to summary judgment of noninfringement.

MediaPointe appealed.

MediaPointe contended that the claims using “optimal/best” language were not indefinite, arguing that the requirement to use measurable performance data (specifically “trace-route results”) provided an objective standard. The Federal Circuit disagreed, finding that this requirement did not supply a reasonably clear and exclusive definition of “optimal/best.” The Court explained that the “trace-route results” requirement was not sufficiently clear because multiple methods could be used to determine compliance, and the patent offered no guidance on which measures to apply.

MediaPointe also challenged the summary judgment of noninfringement for the remaining claims, arguing that the district court applied an improperly narrow construction instead of the ordinary meaning of the disputed limitation. The Federal Circuit rejected this argument, finding that a skilled artisan would not have reasonably understood the claim language more broadly and that the district court’s construction was correct in light of the patent’s context. The Court concluded that because there was no evidence that Akamai’s system met this narrower limitation, even considering the excluded expert testimony, there was no triable issue of fact and no reasonable jury could find infringement.

The Federal Circuit therefore affirmed the district court’s judgment.



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USPTO introduces voluntary search disclosure declarations in Board proceedings

by | Dec 4, 2025 |

The Director of the US Patent and Trademark Office (USPTO) issued a memorandum announcing a new initiative aimed at improving examination quality and transparency in Patent Trial & Appeal Board proceedings.

Effective immediately, petitioners in inter partes review (IPR) and post-grant review (PGR) proceedings may submit a search disclosure declaration (SDD) that explains in detail:

  • Databases and repositories consulted
  • Search approach, search terms, filters, queries, and classification pathways used
  • Analytics or publicly accessible resources referenced
  • Time spent searching and reviewing results
  • Any other relevant methodology details

The submission is voluntary, and petitioners that do not provide an SDD will not be penalized. However, when deciding whether to institute a proceeding, the Board will view submission of an SDD as a favorable discretionary factor, especially if the SDD reveals new or underutilized search pathways relevant to USPTO practices. The SDD may also help demonstrate potential USPTO error during examination, according to the memorandum.

The SDD can be filed confidentially under 37 C.F.R. § 42.14, with a motion to seal and request for in camera review. Protective orders must allow the USPTO to use the information for internal training and analytics. Confidential SDDs will not be publicly disclosed except as required by law, and deposition testimony related to an SDD will generally not be permitted.

Practice note: While optional, submitting an SDD can strengthen an IPR or PGR petition by signaling transparency and contributing to improved USPTO practices. Consider incorporating this step into your Board strategy, especially when leveraging sophisticated search tools or methodologies that the USPTO does not typically use during examination.



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No escape from fees and sanctions for reckless litigation conduct

by | Dec 4, 2025 |

The US Court of Appeals for the Federal Circuit affirmed attorneys’ fees awards against EscapeX IP, LLC, finding the case “exceptional” under 35 U.S.C. § 285, and upheld sanctions under 28 U.S.C. § 1927 based on counsel’s reckless litigation conduct. EscapeX IP, LLC v. Google LLC, Case No. 24-1201 (Fed. Cir. Nov. 25, 2025) (Taranto, Stoll, Stark, JJ.)

EscapeX brought suit against Google in the Western District of Texas, alleging that Google’s YouTube Music product infringed its patent directed to systems for generating artist-specified dynamic albums. After Google pointed out that the accused features were absent from YouTube Music and later demonstrated that the accused “Auto-Add” feature predated the patent’s priority date, EscapeX amended its complaint to list the correct product and refused to dismiss the case.

Shortly after EscapeX sued Google, its patent was invalidated under § 101 in a separate litigation. EscapeX did not appeal that ruling, and Google requested that EscapeX dismiss the case. In response, EscapeX filed what it characterized as a “joint stipulation of dismissal,” which Google contested because it had not agreed to such a filing. Google moved for attorneys’ fees under § 285, arguing that EscapeX had filed frivolous claims and unreasonably prolonged the litigation. The district court agreed, awarding Google its fees.

EscapeX then filed a Rule 59(e) motion to amend the judgment, attaching declarations from its CEO and an engineer to show pre-suit diligence. The district court denied the motion, finding that the evidence was not “newly discovered” and the motion was frivolous. Google successfully sought additional fees and sanctions under § 1927, resulting in an additional $63,525 jointly and severally against EscapeX and its attorneys. EscapeX appealed.

The Federal Circuit affirmed the district court decisions and found no abuse of discretion. The Court concluded that the record supported the finding that EscapeX had not conducted any pre-suit investigation and that the case was “frivolous from the start.” This conclusion was also supported by Google’s early, detailed warnings against filing the suit and EscapeX’s general nonresponsiveness.

Regarding the Rule 59(e) motion, the Federal Circuit agreed that the declarations were not “newly discovered evidence” because they were always within EscapeX’s control and knowledge. The Court rejected arguments of “manifest injustice,” which were not raised in district court and had no merit.

Finally, the Federal Circuit affirmed the sanctions under § 1927, finding that EscapeX’s counsel acted recklessly by filing a frivolous motion that multiplied proceedings. The Court noted that zealous advocacy does not excuse filing baseless motions. The Court upheld Google’s fees and sanctions in their entirety, with costs related to the appeal also awarded to Google.



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Precedential shift: USPTO clarifies patentability of AI training methods

by | Nov 20, 2025 |

On November 4, 2025, the Director of the United States Patent and Trademark Office (USPTO) designated as precedential an appeals review panel (ARP) decision vacating the Patent Trial & Appeal Board’s § 101 rejection of claims directed to training machine learning models. Ex parte Desjardins, Appeal No. 24-000567 (ARP Sept. 26, 2025) (precedential).

The Board had previously concluded that claims covering continual learning techniques (such as adjusting model parameters to maintain performance across sequential tasks) were directed to an unpatentable abstract idea. The ARP, which included the USPTO Director, reversed that determination, holding that the claims integrated the abstract concept into a practical application by improving the functioning of machine learning models themselves. However, the ARP still rejected the claims under § 103 for obviousness.

Key takeaways

  • Technical improvements matter. Artificial intelligence (AI)-related inventions can satisfy Alice Step 2A when they demonstrate technical improvements, such as mitigating catastrophic forgetting and reducing storage complexity.
  • No blanket exclusion. The opinion cautions against categorically excluding AI innovations under § 101 and emphasizes that §§ 102, 103, and 112 remain the proper tools for assessing patent scope.
  • Precedential impact. The decision signals the USPTO’s commitment to aligning examination practices with US Court of Appeals for the Federal Circuit precedent while fostering innovation in AI and machine learning.

Practice note: For applicants, this precedential designation underscores the importance of framing AI-related claims around specific technical improvements rather than abstract concepts, which can be pivotal in overcoming § 101 challenges.



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Well, well, well: Indefinite claims turn out to be a typo

by | Nov 20, 2025 |

The US Court of Appeals for the Federal Circuit reversed a district court ruling that invalidated patent claims for indefiniteness, finding that the disputed language was a minor clerical error. Canatex Completion Solutions, Inc. v. Wellmatics, LLC, et al., Case No. 24-1466 (Fed. Cir. Nov. 12, 2025) (Moore, Prost, Taranto, JJ.)

Canatex sued Wellmatics and several GR Energy entities for infringing its patent directed to a releasable connection for a downhole tool string. The patent covers a two-part device used in oil and gas wells that allows operators to disconnect and retrieve the upper part of the tool string while leaving the lower part in the well if it becomes stuck.

The patent’s claims, abstract, and specification include the phrase “the connection profile of the second part.” During claim construction, the defendants argued that the phrase lacked an antecedent basis, rendering the claims indefinite. Canatex responded that the phrase should have read “the connection profile of the first part” and that a skilled artisan would immediately recognize the error. Canatex asked the district court to construe the phrase accordingly.

The district court disagreed, finding that the “pervasiveness of the error” in both the claims and the specification suggested that the error “was an intentional drafting choice and not an error at all.” The district court added that Canatex’s failure to seek correction from the United States Patent and Trademark Office suggested that the error was neither minor nor evident on the face of the patent. The district court found all asserted claims invalid for indefiniteness. Canatex appealed.

The Federal Circuit reversed. The Court found the error obvious and determined that a skilled artisan would recognize only one reasonable correction, which was changing “second” to “first.” The Court characterized the mistake as a minor clerical or typographical error and rejected arguments that alternative interpretations were plausible. The Court emphasized that its conclusion was consistent with the intrinsic evidence.



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