News & Analysis as of

Patent Prosecution Patent Litigation

Foley & Lardner LLP

Federal Circuit Skeptical of Prosecution Laches

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In Google v. Sonos, the Federal Circuit soundly disposed of arguments that the patent-in-suit was unenforceable due to laches based on an “unreasonable delay” in patent prosecution. Does the court’s reasoning foreclose the...more

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

Rothwell, Figg, Ernst & Manbeck, P.C.

Breaking the Patent Thicket: Why the Proposed ETHIC Act Could Have Big Implications on Pharma Patent Law

On July 15, 2025, U.S. Senators Peter Welch (D‑VT), Josh Hawley (R‑MO), and Amy Klobuchar (D‑MN) introduced the ETHIC Act—the Eliminating Thickets to Increase Competition Act (S. 2276)—in the U.S. Senate. The bill is designed...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

American Conference Institute (ACI)

[Virtual Conference] Passport to Proficiency on the Essentials of Hatch-Waxman and BPCIA - October 14th - 30th, 1:00 pm EST

ACI’s virtual Annual Passport to Proficiency on the Essentials of Hatch-Waxman and BPCIA equips early-career professionals with the legal and regulatory fluency needed to contribute meaningfully to product strategy and...more

Fenwick & West LLP

Navigating the PTAB’s New Discretionary Denial Landscape: Strategic Shifts for Patent Challenges

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The Patent Trial and Appeal Board (PTAB) has undergone significant changes in how it evaluates patent challenges, creating both opportunities and obstacles for technology and life sciences companies....more

Akin Gump Strauss Hauer & Feld LLP

D. Mass.: Knowledge of Parent Patent, by Itself, May Not Suffice to Show Knowledge of Child Patent for Purposes of Indirect and...

In considering a motion to dismiss infringement claims for two related patents, the District of Massachusetts recently held that pre-suit knowledge of a “parent” patent, without more, is insufficient to establish pre-suit...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

Womble Bond Dickinson

Reminder: “Consisting essentially of” Is U.S. Patent Claim Language Needing Interpretation

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On June 30, 2025, the Federal Circuit issued a precedential opinion in Eye Therapies v. Slayback Pharma in which the court interpreted the transition phrase “consisting essentially of” to be a closed term excluding other...more

Robins Kaplan LLP

Azurity Pharms., Inc. v. Alkem Labs. Ltd.

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Nature of the Case and Issue(s) Presented: The ’948 patent claims non-sterile drinkable liquid formulations of vancomycin, an antibiotic used to treat Clostridium difficile infection. These formulations are particularly...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

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

Dinsmore & Shohl LLP

“What You Say Can and Will Be Used Against Your Patent” Says Federal Circuit in New Opinion

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Last week, the Federal Circuit issued its decision in Top Brand LLC v. Cozy Comfort Company LLC, clarifying the application of prosecution history disclaimer in the context of design patents. This alert summarizes the...more

BCLP

Federal Circuit Clarifies Limits of Prosecution Disclaimer in Patent Families

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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

American Conference Institute (ACI)

[Event] 23rd Advanced Summit on Life Sciences Patents - May 19th - 20th, New York, NY

At ACI’s 23rd Advanced Summit on Life Sciences Patents, you can expect informational overviews and thorough discussion of every facet of the industry. In a time of major legislative, regulatory, and judicial change, you can't...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

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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

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

Kilpatrick

5 Key Takeaways | Alice at 10: A Section 101 Update

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It’s been 10 years since Alice was decided. Kilpatrick’s Steve Borgman and Andrew Saul recently presented at the 29th Annual Advanced Patent Law Institute in Austin, Texas, on recent cases and trends in the courts and the...more

A&O Shearman

District Court Reinforces High Bar For Applying Patent Prosecution Bar

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In Champion Power Equipment Inc. v. Firman Power Equipment Inc., No. CV-23-02371-PHX-DWL (D. Ariz. Oct. 18, 2024), defendant filed a motion for a protective order seeking two forms of relief: 1. a patent prosecution bar...more

Fitch, Even, Tabin & Flannery LLP

[Webinar] Navigating the Changes to the Test for Obviousness in Design Patents After LKQ Corp. v. GM Global - October 29th, 9:00...

Please join Fitch Even for a free webinar, “Navigating the Changes to the Test for Obviousness in Design Patents After LKQ Corp. v. GM Global,” on Tuesday, October 29, at 9:00 a.m. PDT / 10:00 a.m. MDT / 11:00 a.m. CDT / 12...more

Kilpatrick

5 Key Takeaways | Rolling with the Legal Punches: Resetting Patent Strategy to Address Changes in the Law

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Kilpatrick partners Tina McKeon, Michael Bertelson, and Michael Turton recently joined Laura Fritts (Vice President, Intellectual Property, Legal, Azurity Pharmaceuticals, Inc.) to present at the annual Kilpatrick...more

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