{"data":{"id":"us/37-cfr-42.8","jurisdiction":"us","citation":"37 CFR 42.8","heading":"Mandatory notices.","body":"(a) Each notice listed in paragraph (b) of this section must be filed with the Board:\n(1) By the petitioner, as part of the petition;\n(2) By the patent owner, or applicant in the case of derivation, within 21 days of service of the petition; or\n(3) By either party, within 21 days of a change of the information listed in paragraph (b) of this section stated in an earlier paper.\n(b) Each of the following notices must be filed:\n(1) Real party-in-interest. Identify each real party-in-interest for the party.\n(2) Related matters. Identify any other judicial or administrative matter that would affect, or be affected by, a decision in the proceeding.\n(3) Lead and back-up counsel. If the party is represented by counsel, then counsel must be identified.\n(4) Service information. Identify (if applicable):\n(i) An electronic mail address;\n(ii) A postal mailing address;\n(iii) A hand-delivery address, if different than the postal mailing address;\n(iv) A telephone number; and\n(v) A facsimile number.","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":"6ca91199c8d2f80fdb312c7c16b109ebb9c54864ad3a46a827e2a3ee59f21beb","source_id":"us-cfr","stale":true,"prev":"us/37-cfr-42.7","next":"us/37-cfr-42.9"},"notice":"GroundRules: Original legal text. Not legal advice."}