II 115th CONGRESS 2d Session S. 2514 IN THE SENATE OF THE UNITED STATES March 7, 2018 Mr. Cotton (for himself, Mrs. McCaskill , Mr. Perdue , Mrs. Ernst , and Mr. Toomey ) introduced the following bill; which was read twice and referred to the Committee on the Judiciary A BILL To amend title 35, United States Code, to provide that a patent owner may not assert sovereign immunity as a defense in certain actions before the United States Patent and Trademark Office, and for other purposes.