U.S. Supreme Court Narrows Assignor Estoppel Doctrine In Continuation Patent Case

Nearly a century after endorsing the doctrine of assignor estoppel, the Court concluded that it applies "when, but only when, the assignor's claim of invalidity contradicts explicit or implicit representations he made in assigning the patent."

5 minute readAugust 01, 2021 at 12:09 AM
By
John Bowler
Kristie Butler
U.S. Supreme Court Narrows Assignor Estoppel Doctrine In Continuation Patent Case

On June 29, the U.S. Supreme Court issued a 5-4 decision inMinerva Surgical, Inc. v. Hologic, Inc., No. 20-440 (June 29, 2021) (slip opinion).Minerva involves a challenge

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