Intellectual PropertyPatent
Patent Post-Grant Proceedings: IPR, PGR, and Reexamination at the PTAB
Since 2012, the cheapest and fastest way to kill a United States patent has not been a district court trial. It has been an inter partes review at the Patent Trial and Appeal Board, where a panel of technically trained administrative judges applies a preponderance standard, no presumption of validity attaches, and a final written decision issues within twelve months of institution. This article explains the full menu of post-grant options, inter partes review, post-grant review, ex parte reexamination, supplemental examination, and reissue, and shows how to choose among them. It covers eligibility windows, the one-year time bar of section 315(b) and how service of a complaint starts it, real-party-in-interest and privity traps, the discretionary denial doctrines built on Fintiv, General Plastic, and section 325(d), the mechanics of institution and trial, motions to amend after Aqua Products, and the estoppel that attaches under section 315(e) after California Institute of Technology v. Broadcom. It also addresses the parallel district court case: when to move for a stay, how the two proceedings interact, and what the different burdens of proof mean in practice. It closes with strategy for petitioners and patent owners, a worked example, an FAQ, and related reading.