What did the Supreme Court define as limitations to the doctrine of Assignor Estoppel?

The Supreme Court in the Minerva Surgical, Inc. v. Hologic, Inc. case reaffirmed that assignor estoppel is a doctrine that is alive in patent law, but also helped define and cement the boundaries of the doctrine with limits in:

• blanket assignments;

• unfavorable changes in law; and

• post assignment developments.

Read about how the Supreme Court defined three limitations to assignor estoppel in patent cases.