{"data":{"id":"us/37-cfr-42.9","jurisdiction":"us","citation":"37 CFR 42.9","heading":"Action by patent owner.","body":"(a) Entire interest. An owner of the entire interest in an involved application or patent may act to the exclusion of the inventor (see § 3.71 of this title).\n(b) Part interest. An owner of a part interest in the subject patent may move to act to the exclusion of an inventor or a co-owner. The motion must show the inability or refusal of an inventor or co-owner to prosecute the proceeding or other cause why it is in the interests of justice to permit the owner of a part interest to act in the trial. In granting the motion, the Board may set conditions on the actions of the parties.","path":["Title 37—Patents, Trademarks, and Copyrights","CHAPTER I—UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE","SUBCHAPTER A—GENERAL","PART 42—TRIAL PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD","Subpart A—Trial Practice and Procedure"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-37.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:45Z","sha256":"8eaf47566ab2ce278efee39ff9744e32909962ea51479393e4516630dcd75037","source_id":"us-cfr","stale":true,"prev":"us/37-cfr-42.8","next":"us/37-cfr-42.10"},"notice":"GroundRules: Original legal text. Not legal advice."}