Post-Grant Proceedings Comparative Analysis

This article is a technical report that provides a comparative analysis of post-grant proceedings in the United States, specifically focusing on Inter Partes Reviews (IPRs), Post-Grant Reviews (PGRs), and Ex Parte Reexaminations (EPRs). It outlines the administrative proceedings established by the America Invents Act (AIA) for challenging the validity of issued patents at the United States Patent and Trademark Office (USPTO). The report details the differences in the timing and filing requirements for each type of proceeding, including the strategic considerations for patent owners and petitioners. It explains the scope of review for each proceeding, highlighting that IPRs and PGRs are limited to challenges on novelty and obviousness, while PGRs can address broader issues. The report also discusses the standards of review, institution rates, and the implications of estoppel in these proceedings. Overall, it presents insights into the practical considerations and strategies for utilizing these post-grant proceedings effectively.