News & Analysis as of

Patent Prosecution Patent Litigation Prosecution History Estoppel

Lathrop GPM

Federal Circuit Says Claim Cancellation Can Create Prosecution History Estoppel

Lathrop GPM on

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

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

Jones Day

Verbal Aspect of Claim Limits Design Patent Scope in Curver Luxembourg v. Home Expressions

Jones Day on

The Federal Circuit affirmed dismissal of design patent infringement claims under an estoppel theory triggered by amendments made to meet patentability requirements in Curver Luxembourg, SARL v. Home Expressions Inc., No....more

Knobbe Martens

The Tangential Exception to Prosecution History Estoppel

Knobbe Martens on

ELI LILLY AND COMPANY v. HOSPIRA, INC. Before Lourie, Moore, and Taranto. Appeal from the District Court for the Southern District of Indiana. Summary: A narrowing claim amendment does not necessarily surrender all...more

Mintz - Intellectual Property Viewpoints

Effect of Prosecution History Estoppel on Infringement Claim under Doctrine of Equivalents

The Federal Circuit in Amgen Inc. v. Coherus Biosciences Inc. affirmed a district court decision that once certain subject matter is clearly and unmistakably surrendered during prosecution, the patentee is barred from...more

Mintz - Intellectual Property Viewpoints

Effect of A Restriction Requirement on Prosecution History Estoppel

The decision whether to issue a Restriction Requirement during patent prosecution lies with the patent examiner, not the patent applicant. A Restriction Requirement can nevertheless trigger prosecution history estoppel that...more

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