IPR Estoppel Remains Elusive for Patent Owners

In Finjan v. Blue Coat Systems, LLC, No. 15-cv-03295-BLF, (N.D. Cal. July 28, 2017), the court took the majority view on the scope of Inter Partes review estoppel, finding no estoppel for grounds of invalidity not included in a pe… Read More

Estoppel, or Lack Thereof, in Inter Partes Reexaminations

The Federal Circuit recently clarified the scope of estoppel for inter partes reexaminations, ruling in a pair of decisions that a district-court decision only estops arguments against individual claims of a patent and that a dism… Read More

Broad Estoppel for IPR Petitioner Asserting Prior Art in District Court

Uncertainty over IPR estoppel continues. In Douglas Dynamics, LLC v. Meyer Products LLC, the Western District of Wisconsin recently ruled that grounds of invalidity left out of a petition for inter partes review are estopped and c… Read More

Judge Robinson Revisits IPR Estoppel, Seeking Federal Circuit Clarification

A district court recently reaffirmed its ruling that statutory estoppel does not apply to grounds of invalidity that could have been included in a petition for an inter partes review but weren’t, clearing the way for the defenda… Read More

Narrow Estoppel for IPR Petitioner Asserting Prior Art in District Court

A district court recently interpreted the statutory estoppel from an Inter Partes Review (IPR) to not apply to prior art that was publicly available at the time of the petition. Intellectual Ventures I LLC et al. v. Toshiba Corp.… Read More