On October 4, 2017, the Federal Circuit held en banc that the proper interpretation of 35 U.S.C. 316(d) and (e) requires the Petitioner in an inter partes review (IPR) to prove all propositions of unpatentability, including for amended claims. Aqua Prods., Inc. v. Matal, No. 2015-1177 (Fed. Cir. Oct. 4, 2017). The en banc Court further determined that the PTAB must consider the entirety of the record when assessing the patentability of amended claims under 318(a), not merely the face of a motion to amend.
The Aqua case resulted in five opinions totaling 148 pages, each presenting views on judgment and underlying rationale, ultimately leading to a narrowly tailored holding. In the decision, the Federal Circuit made clear that the burden of persuasion of patentability does not rest with the Patent Owner; instead, it is left to the Petitioner to establish that any proposed amended claims are not patentable.