News & Analysis as of

Prior Art

Dorsey & Whitney LLP

Federal Circuit Clarifies Scope of IPR Estoppel

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In a precedential opinion entered on May 7, 2025, the United States Court of Appeals for the Federal Circuit affirmed a jury verdict invalidating claims of two patents for anticipation and obviousness over the prior art....more

K&L Gates LLP

Estoppel Estopped?

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The Federal Circuit recently resolved a split among the district courts whether patent infringement defendants who bring inter partes review (IPR) challenges are estopped from raising new prior art challenges in a co-pending...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases: EcoFactor, Inc. v. Google LLC

EcoFactor, Inc. v. Google LLC, Appeal No. 2023-1101 (Fed. Cir. May 21, 2025) In its first en banc decision of the year, the Federal Circuit reversed a district court’s admission of expert testimony concerning damages,...more

Akin Gump Strauss Hauer & Feld LLP

Federal Circuit: Statements Made During Prosecution of Parent Application Disavow Claim Scope in Subsequent Patents

The Federal Circuit affirmed a District of Delaware finding of non-infringement in an ANDA litigation due to the patentee’s clear and unmistakable disavowal of claim scope during prosecution. Specifically, the court held that...more

Jones Day

Institution Denied for Insufficient Publication Evidence

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On October 29, 2024, BabyBjörn AB (“BabyBjörn”) filed two separate petitions for inter partes review (“IPR”) of U.S. Patent No. 11,786,055 (“the ’055 Patent”), which is assigned to The ERGO Baby Carrier, Inc. (“ERGO Baby”). ...more

Smart & Biggar

Alexion awarded injunction against Amgen in SOLIRIS patent action; Court considers anticipation by incorporation by reference

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The Federal Court has granted Alexion a declaration of infringement and an injunction preventing Amgen from manufacturing, using, and selling its proposed biosimilar eculizumab product, BEKEMV, in Canada until the expiration...more

Foley Hoag LLP

Reshaped IPR Landscape: Narrower Estoppel and Fewer New Cases

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Key Takeaways - - A recent Federal Circuit decision in a case involving an inter partes review (IPR) significantly narrowed a patentee’s ability to rely on estoppel to block a defendant from raising invalidity grounds. -...more

Jones Day

Estoppel Trumps Substance: ITC Bars Respondent’s Invalidity Grounds Raised in IPR

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Recently, an ITC Administrative Law Judge applied IPR statutory estoppel under 35 U.S.C. § 315(e)(2) in denying a Respondent’s motion for summary determination of invalidity in Certain Audio Players and Components Thereof,...more

Morrison & Foerster LLP

Discretionary Denials—Act II

On March 26, 2025, the Acting Director of the United States Patent and Trademark Office fundamentally changed how the Patent Trial and Appeal Board (“PTAB”) initially considers petitions in post grant proceedings under the...more

Sheppard Mullin Richter & Hampton LLP

Federal Circuit Provides Clarity on Use of Applicant Admitted Prior Art (“AAPA”) in IPRs

Qualcomm Incorporated v. Apple Inc., No. 23-1208 (Fed. Cir. 2025)—On April 23, 2025, the Federal Circuit reversed the Patent Trial and Appeal Board’s finding that claims of Qualcomm’s U.S. Patent No. 8,063,674 (“the ’674...more

Sheppard Mullin Richter & Hampton LLP

Is it Prior Art? Check the Provisional Application!

This Federal Circuit Opinion analyzed collateral estoppel and the extent to which the non-provisional document would benefit from the provisional application’s priority date, as it relates to Pre-AIA 35 U.S.C. § 102(e)....more

Patterson Belknap Webb & Tyler LLP

Judge Engelmayer Gets a Handle on “BlenderBottle” Patent Claims and Rejects Assertion of Indefiniteness

Judge Paul A. Engelmayer (S.D.N.Y.) recently construed claim terms at issue in a patent litigation between Plaintiffs Trove Brands, LLC, d/b/a The BlenderBottle Company, and Runway Blue, LLC (collectively, “Trove”) and...more

Womble Bond Dickinson

USPTO Accelerates Patent Issuance Timeline - Key Impacts for Patent Applicants and Holders

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Effective May 13, 2025, the United States Patent and Trademark Office (USPTO) will implement a significant change to its patent issuance process, substantially reducing the time between issue notification and patent issuance....more

Jones Day

Federal Circuit: Petitioner Estoppel Does Not Apply to Product Prior At Grounds

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In IOENGINE, LLC v. Ingenico Inc. (Fed. Cir. 2025), the Federal Circuit narrowed the scope of IPR estoppel under 35 U.S.C. § 315(e)(2), which precludes an IPR petitioner from asserting in court that a patent claim “is invalid...more

McDermott Will & Emery

Clickbait: Actual Scope (Not Intended Scope) Determines Broadening Reissue Analysis

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The US Court of Appeals for the Federal Circuit affirmed the Patent Trial & Appeal Board’s rejection of a proposed reissue claim for being broader than the original claim, denying the inventors’ argument that the analysis...more

McDermott Will & Emery

Breaking New Grounds to Limits of IPR Estoppel

McDermott Will & Emery on

In a matter of first impression, the US Court of Appeals for the Federal Circuit found that inter partes review (IPR) estoppel does not preclude a petitioner from relying on the same patents and printed publications as...more

Morgan Lewis

Public Use and Estoppel Reexamined: Strategic Lessons from Ingenico

Morgan Lewis on

This LawFlash details strategic takeaways and practical lessons from the recent US Court of Appeals for the Federal Circuit case on IPR estoppel, evidence of public use, and jury instructions on specific issues....more

WilmerHale

Federal Circuit Provides Guidance on Scope of IPR Estoppel

WilmerHale on

In its recent decision in Ingenico Inc. v. IOENGINE, LLC, the Federal Circuit affirmed the district court’s decision to allow Ingenico to introduce certain prior art at trial, finding that inter partes review (IPR) estoppel...more

WilmerHale

Federal Circuit Patent Watch: Patents That Merely Claim Applying Machine Learning to a New Field of Use Are Not Patent Eligible

WilmerHale on

Stark, J. Sage Products, LLC (“Sage”) challenged a Patent Trial and Appeal Board (“Board”) decision finding two of Sage’s patents unpatentable. After the original appellee, Becton, Dickinson and Co., withdrew, the Director of...more

Alston & Bird

Intellectual Property Litigation Newsletter | May 2025

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Welcome to the Intellectual Property Litigation Newsletter, our review of decisions and trends in the intellectual property arena. In this edition, we learn that belated statements are not relevant but litigation funding...more

Sheppard Mullin Richter & Hampton LLP

A Line in the Sand: Federal Circuit Bounds IPR Estoppel in Ingenico v. IOENGINE

In a significant development for patent litigants, the Federal Circuit in Ingenico Inc. v. IOENGINE, LLC, affirmed an important limitation on the scope of IPR estoppel under 35 U.S.C. § 315(e)(2). Specifically, the court held...more

Venable LLP

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

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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

A&O Shearman

The CAFC Holds That IPR Estoppel Does Not Shield Patentees From System Prior Art

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On May 7, 2025, the U.S. Court of Appeals for the Federal Circuit (“CAFC”) affirmed a decision by the U.S. District Court for the District of Delaware (“district court”) that found claims of two IOENGINE, LLC (“IOENGINE”)...more

Akin Gump Strauss Hauer & Feld LLP

Claim Construction Issues and Large Number of Claims Not Enough to Institute a Second Petition for Inter Partes Review

The Patent Trial and Appeal Board recently declined to institute a petition for IPR that was filed on the same day that the petitioner filed another petition challenging the same claims of the same patent. The board was not...more

Vinson & Elkins LLP

Federal Circuit Defines Scope of IPR Estoppel

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In Ingenico Inc. v. IOENGINE, LLC, the Federal Circuit defined for the first time the scope of inter partes review (“IPR”) estoppel in district court and International Trade Commission (ITC) proceedings: IPR estoppel applies...more

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