US Supreme Court upholds assignor estoppel while narrowing the doctrine

Charles R Macedo, David P Goldberg, Chandler Sturm, Devin Garrity and Thomas Hart

Journal of Intellectual Property Law and Practice, 2021, vol. 16, issue 12, 1298-1301

Abstract: Minerva Surgical, Inc. v Hologic, Inc., No. 20–440, 594 US ___, United States Supreme Court, 29 June 2021 (Minerva)Hologic, Inc. v Minerva Surgical, Inc., 957 F3d 1256 (Federal Circuit 2020) (‘Hologic’), rehearing and rehearing en banc denied, petition for certiorari filedOn 29 June 2021, the US Supreme Court issued a decision in Minerva Surgical, Inc. v Hologic, Inc. upholding the doctrine of assignor estoppel, which prevents inventors from challenging the validity of patents they have assigned to third parties. The court limited the scope of assignor estoppel to cases where the inventor made ‘explicit or implicit representations’ regarding the patentability of the claimed invention.

Date: 2021
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