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Intellectual Property Protection Patent Applications Prosecution History Estoppel

Cooley LLP

Federal Circuit Strengthens Prosecution History Estoppel Principles in Colibri Heart Valve LLC v. Medtronic CoreValve, LLC

Cooley LLP on

On July 18, 2025, the US Court of Appeals for the Federal Circuit reversed a lower court ruling in Colibri Heart Valve LLC v. Medtronic CoreValve, LLC, holding that prosecution history estoppel barred the patentees’ doctrine...more

Cozen O'Connor

The Tangential Exception to the Presumption of Prosecution History Estoppel

Cozen O'Connor on

The Federal Circuit has consistently described the “tangential” exception to the presumption of prosecution history estoppel as “very narrow.” Only a few Federal Circuit decisions have found proof of the tangential exception...more

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