Minerva Surgical, Inc. v. Hologic, Inc.

Decided June 29, 2021. Elena Kagan delivered the opinion of the Court.

Docket 20-440 · 594 U.S. 559 · Cited 19 times

The well-grounded patent law doctrine of assignor estoppel applies only when the assignor’s claim of invalidity contradicts explicit or implicit representations the assignor made in assigning the patent.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

Read the official opinion (PDF, supremecourt.gov) (opens primary source in a new tab)

Elena Kagan’s profile · All opinions since October Term 2017 · The Supreme Court

Source: Supreme Court of the United States, slip opinions (2021). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-02. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).