(December 12, 2017, 12:12 PM EST) -- WASHINGTON, D.C. — The U.S. Patent and Trademark Office (USPTO) urges the Federal Circuit U.S. Court of Appeals in a Nov. 15 brief to uphold its June 2017 ruling that plaintiffs challenging a rejected patent application in court pursuant to Section 145 of the Patent Act, 35 U.S.C. § 145, should pay “all the expenses of the proceedings” (Nantkwest Inc. v. Joseph A. Matal, Acting Director U.S. Patent and Trademark Office, No. 16-1794, Fed. Cir.)....