A recent ruling from the Patent and Trial Appeal Board (PTAB) highlights the critical role that collateral estoppel (also known as issue preclusion) can play in inter partes review (IPR) proceedings.

March 20, 2025 - In February 2025, the U.S. Court of Appeals for the Federal Circuit clarified when collateral estoppel might apply in a district court case following an invalidity determination by ...

A party seeking to assert the bar of collateral estoppel must establish that (1) the issue of fact or law sought to be litigated in the second action was fully and fairly litigated in the first action ...

The Moyer case is an important reminder for both the family law practitioner and bench. It stresses the importance of res judicata and collateral estoppel for the smooth running of the courts and ...

“If a court reverses or vacates a judgment upon which a collateral estoppel decision is based, then collateral estoppel can no longer apply based on that decision.”- CAFC The U.S. Court of Appeals for ...