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The United States Patent and Trademark Office (USPTO or Office) proposes changes to the rules of practice in inter partes review, post-grant review, and the transitional program for covered business method patents (collectively post-grant trial) proceedings before the Patent Trial and Appeal Board (PTAB or Board) to conform the rules to existing Board practices.  The Supreme Court in SAS Institute Inc. v. Iancu, 138 S. Ct. 1348 (2018), overturned the Board’s practice of instituting a post-grant trial on a subset of the claims or grounds in a petition.  The Board has also recently adopted a practice of allowing sur-replies in all post-grant trials.  In light of SAS Institute, and to better ensure the predictability and certainty of post-grant trial proceedings before the Board, the Office proposes changes to the rules of practice governing institution of post-grant trials; the scope of patent owner responses in post-grant trials; and the provision for, and type-volume limits of, sur-replies.