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
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
Patent practitioners are probably well familiar with circumstances in which prosecution history estoppel can limit the scope of a U.S. utility patent’s claims. Examples include claim amendments and statements made by the...more