On November 21st, the PTAB issued guidance on motions to amend based on the Federal Circuit’s en banc decision in Aqua Products, Inc. v. Matal, 872 F.3d 1290 (Fed. Cir. 2017). In view of the Aqua Products decision, the PTAB will not place the burden of persuasion on the patent owner with respect to the patentability of substitute claims presented in a motion to amend. Instead, after the patent owner files a motion to amend, the Board will determine whether the substitute claims are unpatentable by a preponderance of the evidence based on the entirety of the record, including the opposition by the petitioner.