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 ...
March 24, 2022 - Patent Trial and Appeal Board post-grant validity challenges — for example, inter partes reviews (IPR) — are frequent components of a patent litigation strategy. However, filing an ...
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 ...
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