News & Analysis as of

Patent Prosecution Appeals

Morrison & Foerster LLP

Federal Circuit Pushes Back on Prosecution Laches

In October 2023, we reported on the district court decision in Sonos, Inc. v. Google LLC. The decision was notable for reviving the prosecution laches doctrine to render unenforceable a continuation patent filed 13 years...more

Bradley Arant Boult Cummings LLP

The Federal Circuit Calls for a Replay Allowing Sonos Another Opportunity at Google

The Federal Circuit’s recent decision in Google LLC v. Sonos, Inc. (24-1097) offers a compelling look at the evolving doctrine of prosecution laches, the written description requirement, and the practical realities of patent...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases: Global Health Solutions LLC v. Selner

Global Health Solutions LLC v. Selner, Appeal No. 2023-2009 (Fed. Cir. Aug. 26, 2025) - In our Case of the Week, the Federal Circuit conducted its first review of a derivation proceeding under the America Invents Act that...more

Knobbe Martens

Deleted Specification Portions Undermine Claim Construction

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FMC Corp. v. Sharda USA, LLC - Before Moore, Chen, and Barnett. Appeal from the Eastern District of Pennsylvania. The district court erred by construing a claim term based on disclosures made in a provisional application and...more

Morgan Lewis

Federal Circuit Applies Prosecution History Estoppel Based on Claim Cancellation

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The US Court of Appeals for the Federal Circuit recently held that cancellation of a claim during prosecution may give rise to prosecution history estoppel, precluding the patentee from recapturing the surrendered subject...more

Hudnell Law Group

Federal Circuit Rejects Formalistic Shield to Prosecution History Estoppel

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On July 18, 2025, the U.S. Court of Appeals for the Federal Circuit reversed a $106 million jury verdict in Colibri Heart Valve LLC v. Medtronic CoreValve, LLC, No. 2023-2153, finding that Colibri’s infringement claim under...more

Lathrop GPM

Federal Circuit Says Claim Cancellation Can Create Prosecution History Estoppel

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In a July 18 precedential decision in Colibri Heart Valve LLC v. Medtronic CoreValve LLC, the U.S. Court of Appeals for the Federal Circuit overturned a $106 million jury verdict against Medtronic for infringement of a patent...more

BCLP

Federal Circuit Clarifies Limits of Prosecution Disclaimer in Patent Families

BCLP on

In Maquet Cardiovascular LLC v. Abiomed Inc., 131 F.4th 1330 (Fed. Cir. 2025), the Federal Circuit addressed whether the prosecution history of one patent in a patent family can limit the scope of claims in a different patent...more

Womble Bond Dickinson

Developments in Patent Subject Matter Eligibility for Software-Related Inventions, in View of Guvera v. Spotify

Womble Bond Dickinson on

Innovators seeking patent protection for software inventions should be aware that all software inventions face patent-eligibility issues. Nevertheless, patent practitioners who are experienced in the art of software patent...more

MoFo Life Sciences

In Patent Prosecution, You Have the Right to Remain Silent. Anything You Say Can and Will Be Used Against You in the Court of Law

MoFo Life Sciences on

While a Miranda warning isn’t given prior to starting substantive examination, perhaps it should be. In Azurity Pharmaceuticals, Inc. v. Alkem Laboratories, Ltd., a precedential decision issued on April 8, 2025, the Federal...more

MoFo Tech

Federal Circuit Clarifies Requirements for Prior Art Under Pre-AIA 35 U.S.C. § 102(e)

MoFo Tech on

Knowing what qualifies as prior art is a core requirement of patent practitioners—whether in life sciences, in the technology sectors or in post-grant proceedings. It is important to keep abreast of changes to the rules,...more

Lathrop GPM

Significant Federal Circuit Decision Redefines Prior Art Requirements

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Last week a remarkably interesting Federal Circuit case was decided concerning whether an asserted reference was properly shown to qualify as prior art in the rejection of a pending patent application. The pending application...more

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

Resolving Claim Ambiguity via Reissue

Takeaways - -Intra-patent claim inconsistencies are errors correctible via reissue. -Subtle legal distinctions in reissue may require PTAB appeals. Patent prosecution errors occur. One such error that occurs is...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - January 2023 #3

Personalized Media Communications, LLC v. Apple, Inc., Appeal No. 2021-2275 (Fed. Cir. Jan. 20, 2023) Our Case of the Week focuses on the doctrine of prosecution laches. Following a bench trial on the issue held shortly...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2021 Decisions: Hyatt v. Hirshfeld, 998 F.3d 1347 (Fed. Cir. 2021)

In Hyatt, the U.S. Court of Appeals for the Federal Circuit addressed “for the first time the PTO’s assertion of a prosecution laches defense in a civil action brought by a patentee under 35 U.S.C. § 145 to obtain a patent.”...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2021 Decisions

[co-author: Jamie Dohopolski] Last year, the continued global COVID-19 pandemic forced American courts to largely continue the procedures set in place in 2020. The U.S. Court of Appeals for the Federal Circuit was no...more

McDermott Will & Schulte

Submarine Sunk: Patent Prosecution Laches Pops GATT Bubble

Addressing for the first time whether the US Patent & Trademark Office (PTO) can assert prosecution laches as a defense in a civil action brought under 35 U.S.C. §145, the US Court of Appeals for the Federal Circuit held that...more

McDermott Will & Schulte

Targeted Advertising Still Patent Ineligible Subject Matter

The US Court of Appeals for the Federal Circuit found that targeted advertising is still an abstract idea and that a system providing targeted advertising must utilize something more than generic features and routine...more

Mintz - Intellectual Property Viewpoints

Expediting Patent Prosecution After An Advisory Action

It can be difficult to advance prosecution of a U.S. patent application efficiently and effectively after prosecution has been closed and an Advisory Action has been mailed. Various U.S. Patent and Trademark Office (USPTO)...more

Knobbe Martens

Federal Circuit Rejects Claim Construction That Contradicts Dependent Claims

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BAXALTA INC. V. GENENTECH, INC. Before Moore, Plager, and Wallach. Appeal from the District of Delaware Summary: A district court erred by interpreting a specification’s description of an “antibody” as a definition,...more

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

Patent Prosecution Tool Kit: The Changing Face of Non-Obviousness

It is difficult to think of a case that has had more influence on patent practice than KSR v. Teleflex (550 U.S. 398 (2007)). In KSR, the U.S. Supreme Court rejected the established practice that an invention could not be...more

McDonnell Boehnen Hulbert & Berghoff LLP

Immunex Corp. v. Sandoz Inc. (Fed. Cir. 2020)

The Federal Circuit held recently that the "all substantive rights" test, used heretofore to determine the identity of the "patentee" for purposes of satisfying 35 U.S.C. § 281, should be the standard for determining common...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - March 2020 #2

PATENT CASE OF THE WEEK - Communication Test Design, Inc. v. Contec, LLC, Appeal No. 2019-1672 (Fed. Cir. March 13, 2020) - This week’s Case of the Week explores two important procedural issues: a court’s discretion to...more

Knobbe Martens

Examiner Amendments Can Trigger Prosecution History Estoppel

Knobbe Martens on

Amgen, Inc. v. Amneal Pharmas. LLC et al - Before Newman, Lourie, and Taranto.  Appeal from the U.S. District Court for the District of Delaware. Summary: An examiner amendment may give rise to prosecution history...more

McDermott Will & Schulte

Federal Circuit Sides with PTO on Applicant Delay in Patent Term Adjustment

In a case explaining what comprises an “applicant delay” in the context of a patent term adjustment (PTA), the US Court of Appeals for the Federal Circuit sided with the US Patent and Trademark Office (PTO) ruling that the...more

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