This blog has previously discussed the effect of several different types of estoppel. See, e.g., Estoppel Estopped for Remanded Claims, Reminder: Estoppel May Not Preclude Prior-Art Systems, and PGR ...

When thinking about estoppel and the PTAB, the § 315(e) estoppels—relating to grounds a petitioner raised or reasonably could have raised—are likely the first to come to mind. However, other types of ...

July 01, 2025 - On May 7, 2025, the U.S. Court of Appeals for the Federal Circuit addressed a longstanding split among district courts concerning the scope of inter partes review ("IPR") estoppel.

Q: I recently contacted my condominium association to get an account status for refinancing my mortgage. I was charged $299.00, which seems like a lot. Is this a valid charge? (J.R., via e-mail) A: ...