News & Analysis as of

Inter Partes Review (IPR) Proceeding United States Patent and Trademark Office Prior Art

McDonnell Boehnen Hulbert & Berghoff LLP

Valve Corp. v. Ironburg Inventions Ltd. (Fed. Cir. 2025)

On April 23, 2025, the Federal Circuit rendered an opinion in Valve Corp. v. Ironburg Inventions Ltd. surrounding U.S. Patent No. 9,289,688 (the '688 patent").  This marks the second time that the Federal Circuit has weighed...more

Jones Day

PTAB Institutes IPR Despite Concurrent Ex Parte Reexamination

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In Thermaltake Technology Co., Ltd. et al v. Chien-Hao Chen et al, IPR2024-01230, Paper 12 (PTAB Feb. 19, 2025), the PTAB granted the institution of inter partes review (“IPR”) while an ex parte reexamination (“EPR”) on the...more

Fish & Richardson

PTAB Issues FAQs on Interim Process for Workload Management

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Last week, the Patent Trial and Appeal Board (PTAB) issued a list of FAQs related to the new bifurcated process for discretionary denial established in the March 26 memorandum issued by Acting Director Stewart. The FAQs...more

Fish & Richardson

EPRx 201: The Risks and Rewards of Ex Parte Reexamination

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Ex parte reexamination (EPRx) comes with risks and rewards for both patent challengers and patent owners. Patent challengers enjoy a lower threshold for institution and avoid the estoppel risk of other post-grant proceedings...more

Fish & Richardson

EPRx 101: Getting to Know Ex Parte Reexamination

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Ex parte reexamination (EPRx) is a powerful tool that allows any party — including the patent owner — to request that the United States Patent and Trademark Office (USPTO) reassess the validity of an issued patent based on...more

Mintz - Intellectual Property Viewpoints

Federal Circuit Affirms PTAB’s Analysis Finding Product-by-Process Claim Narrowed During Prosecution Valid Over Prior Art

In a precedential opinion issued on March 4, 2025, in Restem, LLC v. Jadi Cell, LLC, No, 23-2054, the U.S. Court of Appeals for the Federal Circuit affirmed the PTAB’s claim construction and ruling that product-by-process...more

Jones Day

Petitioner’s Proof of Printed Publication Falls Short

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On February 6, 2025, the PTAB denied IPR institution because the Petitioner failed to establish that its key prior art reference qualified as a printed publication under Section 102(b). The PTAB’s decision hinged on whether...more

Venable LLP

Spotlight On: Actemra® (tocilizumab) / Tofidence™ (tocilizumab-bavi) / Tyenne® (tocilizumab-aazg) / Avtozma® (tocilizumab-anoh) -...

Venable LLP on

Tocilizumab Challenged Claim Types in IPRs: Claims are counted in each IPR, so claims from the same patent challenged in multiple IPRs are counted more than once. Within each IPR, claims are counted only once, whether they...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Antedating Prior Art in Reissue and Reexamination: Part 1

Takeaways - - Pre-AIA patents may be able to “swear behind” prior art applied in reissue and reexamination. - “Swearing behind” has limits and obtaining sufficient evidence to establish prior invention may be difficult to...more

Fish & Richardson

2024 Post-Grant Annual Report

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Fish & Richardson’s 2024 Post-Grant Report takes a deep dive into the cases, trends, and statistics that shaped Patent Trial and Appeal Board (PTAB) practice throughout the year and how they might affect practitioners going...more

Jones Day

Two Separate Analyses: Nonobviousness vs Enablement

Jones Day on

Recently, a Director Review was granted where Director Vidal vacated the Patent Trial and Appeals Board’s (“PTAB”) Final Written Decision and remanded back to the PTAB for further consideration of enablement.  Duration Media...more

Knobbe Martens

Every Word Counts: Specification Naming Conventions Can Limit Claim Scope

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A patent’s specification established a naming convention that applied to terms in the patent’s claims. Microchip Technology filed an IPR, arguing all claims of HD Silicon Solutions’ patent were invalid. The challenged patent...more

Vorys, Sater, Seymour and Pease LLP

The Precedent: Federal Circuit Clarifies Timing Issues Associated with Pre-AIA Patent Applications in Lynk Labs, Inc. v. Samsung...

In this edition of The Precedent, we outline the recent federal circuit decision in Lynk Labs, Inc. v. Samsung Elecs. Co. This case addresses the date on which a pre-AIA published patent application obtains its status as...more

McDermott Will & Emery

It’s Obvious: Erroneous Claim Construction Can Be Harmless

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board obviousness determination even though it found the Board had improperly construed a claim term, because the Court found the error harmless...more

Jones Day

Federal Circuit Remands Based On Inadequate Explanation

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Palo Alto Networks (PAN) filed a petition for inter partes review of Centripetal Networks’ patent—U.S. Patent No. 10,530,903—which is directed to a computing system for correlating packets in communication networks with a...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

2024 PTAB Year in Review: Analysis & Trends

The Patent Trial and Appeal Board (PTAB) continues to play a pivotal role in shaping the intellectual property landscape. In 2024, several developments affecting PTAB practice emerged, from new rulemaking at the USPTO to key...more

Baker Botts L.L.P.

35 U.S.C. § 112 in IPR: I know you cannot use it to invalidate a claim, but how about breaking the priority chain?

Baker Botts L.L.P. on

It is well established that “a petitioner in an inter partes review … is not permitted to assert a ground of unpatentability under 35 U.S.C. § 112.” Dexcowin Golabl, Inc. v. Aribex, Inc., IPR2016-00436, Paper 12 (PTAB July 7,...more

Hudnell Law Group

Published but not Public? Federal Circuit Confirms Published Patent Applications Count as Prior Art from Filing Date in IPRs.

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On January 14, 2025, the United States Court of Appeals for the Federal Circuit issued a precedential decision in Lynk Labs, Inc. v. Samsung Electronics Co., No. 23-2346 (Fed. Cir. Jan. 14, 2025), addressing whether a...more

A&O Shearman

Federal Circuit Affirms That Published Patent Applications Are Prior Art in IPRs As Of Their Filing Dates, Not Their Publication...

A&O Shearman on

On January 14, 2025, the United States Court of Appeals for the Federal Circuit (“CAFC”) issued a precedential opinion affirming a final written decision from the U.S. Patent Trial and Appeal Board (“PTAB”) finding the...more

Jones Day

Similar Claims in Prior IPR Petition Leads to Denial

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The PTAB recently denied institution of inter partes review of a patent directed to deep packet inspection in software defined networks in Juniper Networks, Inc. v. Orckit Corporation, IPR2024-00895. Applying the General...more

Morgan Lewis

Federal Circuit Clarifies Secret Prior Art May Be Used in IPR Challenges

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On January 14, 2025, the Federal Circuit in Lynk Labs Inc. v. Samsung Electronics Co. Ltd. clarified that inter partes review challenges may be “based upon published patent applications, and such published patent applications...more

Fitch, Even, Tabin & Flannery LLP

IP Alert: Federal Circuit Clarifies What Is Deemed Prior Art in an IPR

On January 14, in Lynk Labs, Inc. v. Samsung Electronics Co., Ltd., the Federal Circuit held that a published patent application can be prior art in an inter partes review (IPR) based on the application’s filing date, not the...more

Jones Day

When Is a Published Patent Application Prior Art in an IPR?

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On appeal from an inter partes review (“IPR”), the Federal Circuit held that, under pre-America Invents Act (“pre-AIA”) law, a published patent application is prior art as of its filing date as opposed to its later date of...more

Knobbe Martens

A Published Patent Application Is IPR Prior Art as of Its Filing Date

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Before Lourie, Prost, and Stark - Summary: In an IPR, a patent application is considered a “printed publication” as of the application’s filing date, not its publication date. Samsung filed a petition for IPR of a Lynk Labs...more

Jones Day

Two Many IPRs: Different References Insufficient for Parallel IPRs

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The Patent Trial and Appeal Board (“PTAB”) recently denied institution in an inter partes review (“IPR”) where Petitioner later filed a parallel petition against the same claims of the same patent.   Shenzhen Root Tech. Co.,...more

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