The estoppel provision of 35 U.S.C. ยง 315(e)(1) had largely prevented requesters from challenging claims of a patent via ex parte reexamination after an inter partes review (IPR) that resulted in a final written decision...more
In re Cellect, LLC, Appeal Nos. 2022-1293, -1294, -1295, -1296 (Fed. Cir. Aug. 28, 2023) In a significant appeal from ex parte reexamination proceedings before the Patent Trial and Appeal Board, the Federal Circuit...more