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United States Patent and Trademark Office › Patent Litigation › Patent Infringement

The U.S. Patent and Trademark Office is an agency of the United States Department of Commerce that serves a fundamental role in the U.S. intellectual property system by issuing patents and registering trademarks.... more +
The U.S. Patent and Trademark Office is an agency of the United States Department of Commerce that serves a fundamental role in the U.S. intellectual property system by issuing patents and registering trademarks.    less -
Jones Day

Acting Director Clarifies Multi-Petition Policy for Competing Constructions

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On June 25, 2025, Acting Director Coke Stewart released an informative decision vacating institution of inter partes review (“IPR”) based on two petitions that were primarily filed to present two different constructions....more

Irwin IP LLP

Arguments in Prosecution History Limit Design Patents Too 

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The USPTO must reject a patent application if the applicant’s claim covers what the prior art already disclosed, and patent applicants may respond to such rejections with arguments that what they claimed was different. ...more

Patterson Belknap Webb & Tyler LLP

Out With the Old, in With the New: Judge Ramos Grants Leave to Assert New Patents After the Original Patents-in-Suit Were Found...

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On July 29, 2025, Judge Edgardo Ramos (S.D.N.Y.) granted plaintiff Kannuu Pty, Ltd. (“Kannuu”) leave to amend its complaint to allege infringement of two newly-issued patents, after the U.S. Patent and Trademark Office...more

Baker Botts L.L.P.

Intellectual Property Report August 2025

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Key Takeaway: When facing a patent infringement suit, accused infringers traditionally turned to inter partes review (IPR) as a faster, more cost-effective alternative to district court litigation. However, recent guidance...more

Baker Botts L.L.P.

Ex Parte Reexaminations Poised to Make a Quiet Comeback: Discretionary Denial Guidance for Inter Partes Reexamination May Increase...

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Imagine this. You were just served with a Complaint for patent infringement and learn that, some years ago, your competitor was granted a patent giving them a legal monopoly to exclude others, including you, from making,...more

K&L Gates LLP

USPTO Director Ends IPR Against Midas Green Technologies

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On 25 July 2025, K&L Gates secured an important win for its client, Midas Green Technologies, LLC. Acting USPTO Director Coke Morgan Stewart granted Director review and denied institution of an inter partes review (IPR)...more

Alston & Bird

Patent Case Summaries | Week Ending July 25, 2025

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IGT v. Zynga Inc., No. 2023-2262 (Fed. Cir. (PTAB) July 22, 2025). Opinion by Taranto, joined by Prost and Reyna. IGT owns a patent related to secured virtual networks in gaming environments. After the patent application was...more

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

Rise of Obviousness Double Patenting SNQs and Rejections in Reexaminations Challenging Expired Patents

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Obvious-type double patenting (ODP) has historically served as a tool to prevent patent owners from extending exclusivity beyond the statutory allowed patent term and to tie patent families together during sale. Historically,...more

Fenwick & West LLP

Federal Circuit Confirms: Prosecution History Disclaimer Applies to Design Patents Too

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Many industries rely on design patents to protect the look and feel of their products—especially when aesthetics drive customer interest, brand identity, or market differentiation. In Top Brand LLC v. Cozy Comfort Company...more

Jones Day

Inventor Testimony of Reduction Date Leads to Denial

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The Patent Trial and Appeal Board (PTAB) denied institution of an inter partes review (IPR) brought by Par-Kan Company, LLC against Unverferth Manufacturing Company regarding U.S. Patent No. 8,967,940 (“the ‘940 patent”). ...more

Sheppard Mullin Richter & Hampton LLP

Lexicography: Clear And Unequivocal

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This Federal Circuit opinion analyzes lexicography in the context of claim construction. Alnylam Pharmaceuticals owns U.S. Patent Nos. 11,246,933 (parent) and 11,382,979 (child). These patents relate to biodegradable...more

Jones Day

Discretionary Denial Where Inventors Petitioned for Unpatentability

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Coke Morgan Stewart, the acting director of the United States Patent and Trademark Office (“USPTO”), exercised discretion under 35 U.S.C. § 314(a) to deny Tessell’s (“Petitioner’s”) petition in favor of Nutanix (“Patent...more

Proskauer - The Patent Playbook

PTO Creates New Expectations Regarding Discretionary Denials

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On the heels of the U.S. Patent and Trademark Office Acting Director’s recent decision to deny institution of iRhythm Technologies’ inter partes review petition, the PTO has now issued additional decisions clarifying the role...more

Jones Day

Discretionary Denial of IPR Institution Due to Advanced Hatch-Waxman Litigation

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In a recent decision, the Patent Trial and Appeals Board (“PTAB”) exercised its discretion under 35 U.S.C. § 314(a) to deny institution of an inter partes review (“IPR”) after applying the Fintiv factors, despite Petitioner’s...more

McDonnell Boehnen Hulbert & Berghoff LLP

The DOJ and PTO’s trial balloon on patent injunctions

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Almost two decades ago the Supreme Court handed down what has turned out to be one of its most significant patent decisions of this century: eBay v. MercExchange. The eBay case has had the effect of precluding prevailing...more

Ballard Spahr LLP

Government Signals Potential Shift Toward Preliminary Injunctions in Patent Infringement Cases

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In a recent patent case, the U.S. government urged a Texas federal court to give greater weight to the difficulty of calculating damages as a basis for finding irreparable harm. If embraced by courts, the move could give...more

Jones Day

Delegated Rehearing Panel Sends Lifeline to Mercedes-Benz

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A Delegated Rehearing Panel (“DRP”) recently modified the PTAB’s construction of the claim term “workload” and remanded, giving Mercedes-Benz USA, LLC (“Petitioner”) another opportunity to challenge a processor patent....more

BakerHostetler

Irreparable Harm Reimagined: The Government’s Patent Intervention in East Texas

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In a bold and unusual move, the DOJ’s Antitrust Division and the USPTO have jointly filed a Statement of Interest in a patent case – not before the Supreme Court or Federal Circuit, but in a district court in East Texas. The...more

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

U.S. IP Update – June 2025

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Sterne Kessler’s U.S. IP Update is a newsletter delivering the latest developments in U.S. intellectual property law, tailored for companies and legal counsel in Korea. Stay informed on key court decisions, policy changes,...more

Jones Day

USPTO Acting Director Denies IPR Institution Based on "Settled Expectations"

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Under a new U.S. Patent and Trademark Office ("USPTO") policy issued in March 2025, pre-institution inter partes review ("IPR") proceedings are now bifurcated, consisting of a first phase in which the director considers...more

Volpe Koenig

“Settled Expectations” as the New Gatekeeper for PTAB Discretionary Denials: Why Late-Stage IPRs Are Getting Harder to File

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When Acting USPTO Director Coke Morgan Stewart denied institution in Dabico v. AXA Power IPR2025-00408  Paper 21, much of the commentary focused on the result....more

Vinson & Elkins LLP

File Early or Risk Denial: iRhythm IPR Institution Denial Underscores the Importance of Filing IPR Petitions Sooner Rather Than...

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On June 6, 2025, the Acting Director of the United States Patent and Trademark Office (“USPTO”), Coke Morgan Stewart, issued a decision denying institution of five inter partes review (“IPR”) petitions filed by iRhythm, Inc....more

Volpe Koenig

When an IDS Comes Back to Haunt You: Lessons from iRhythm v. Welch Allyn

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Patent attorneys are well-versed in the function of the Information Disclosure Statement (IDS) during prosecution. We understand that listing prior art in an IDS satisfies the duty of candor, helps insulate patents from...more

Jones Day

Applying Fintiv to a Parallel ITC Investigation

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The Patent Trial and Appeals Board (“PTAB”) recently denied institution of an inter partes review (“IPR”), exercising its discretion under 35 U.S.C. § 314(a)and Apple Inc. v. Fintiv Inc., IPR2020-00019 (PTAB Mar. 20, 2020)...more

Jones Day

April 2025 Institution Rate Slips Below 45 Percent

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The PTAB has published its monthly statistics wrap up for April 2025. As expected, those statistics show a significant decline in the institution rate compared to the first six months of the fiscal year. In those first six...more

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