Code of Federal Regulations > Title 37 > Chapter I > Part 42 - PART 42—TRIAL PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

Subpart A [§ 42.1 - § 42.80] - Subpart A—Trial Practice and Procedure

Subpart B [§ 42.100 - § 42.123] - Subpart B—Inter Partes Review

Subpart C [§ 42.200 - § 42.224] - Subpart C—Post-Grant Review

Subpart D [§ 42.300 - § 42.304] - Subpart D—Transitional Program for Covered Business Method Patents

Subpart E [§ 42.400 - § 42.412] - Subpart E—Derivation