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Patent Litigation Patent Infringement Claim Amendments

Hudnell Law Group

Federal Circuit Rejects Formalistic Shield to Prosecution History Estoppel

Hudnell Law Group on

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

International Lawyers Network

The Supreme Court’s Adjudication on Whether a Post-grant Amendment of a Granted Patent Constitutes an Amendment of the Litigation...

When granted with a patent right, the patentee may file a request for amending the description, claim(s) or drawing(s) of the granted patent.  Hence, once an alleged infringer has presented prior evidence sufficient to...more

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

PTAB Strategies and Insights - December 2019: Amending Claims in IPR: Objective Indicia May Be a Strategic Guide Post

As PTAB practitioners know, statistics on successful motions to amend are quite dismal. But in a recent case, the PTAB shed light on what may be a successful strategy for patent owners to amend their claims in an Inter Partes...more

Knobbe Martens

Prosecution History Estoppel Bars Infringement Claim Under Doctrine of Equivalents

Knobbe Martens on

PHARMA TECH SOLUTIONS, INC. v. LIFESCAN, INC. Before Moore, Reyna, and Stoll. Appeal from the United States District Court for the District of Nevada. Summary: Claims for infringement under the doctrine of equivalents...more

Jones Day

Trial Court Denies Amendment of Contentions To Add Reexam Claims Following Successful IPR

Jones Day on

What happens when patent claims are found unpatentable in inter partes review (“IPR”) and new claims are subsequently added to that patent through ex parte reexamination? The District Court for the Northern District of...more

Foley & Lardner LLP

Doctrine Of Equivalents Not Barred By Claim Amendments

Foley & Lardner LLP on

Recent Federal Circuit decisions demonstrate that the doctrine of equivalents is alive and well, and not always barred by claim amendments. In both Ajinomoto Co. v. ITC and Eli Lilly and Co. v. Hospira, Inc., the Federal...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 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

Bradley Arant Boult Cummings LLP

Federal Circuit Finds General Allegations of Infringement Sufficient under Iqbal/Twombly

After having its complaint for patent infringement dismissed for failure to state a claim and being denied its request to file an amended complaint in the Middle District of Georgia, Disc Disease Solutions turned to the...more

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