{"data":{"id":"us/37-cfr-42.120","jurisdiction":"us","citation":"37 CFR 42.120","heading":"Patent owner response.","body":"(a) Scope. A patent owner may file a single response to the petition and/or decision on institution. A patent owner response is filed as an opposition and is subject to the page limits provided in § 42.24.\n(b) Due date for response. If no time for filing a patent owner response to a petition is provided in a Board order, the default date for filing a patent owner response is three months from the date the inter partes review was instituted.","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 B—Inter Partes Review"],"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":"66bf52f79783e001110090d1661d0f116be6294ecd345cc94942d71c4804e995","source_id":"us-cfr","stale":true,"prev":"us/37-cfr-42.108","next":"us/37-cfr-42.121"},"notice":"GroundRules: Original legal text. Not legal advice."}