2011—Pub. L. 112–29 amended section generally. Prior to amendment, section related to certificate of patentability, unpatentability, and claim cancellation.

2002—Pub. L. 107–273 made technical correction to directory language of Pub. L. 106–113, which enacted this section.

Amendment by Pub. L. 112–29 effective upon the expiration of the 1-year period beginning on Sept. 16, 2011, and applicable to any patent issued before, on, or after that effective date, with provisions for graduated implementation, see section 6(c)(2) of Pub. L. 112–29, set out as a note under section 311 of this title.

Section effective Nov. 29, 1999, and applicable to any patent issuing from an original application filed in the United States on or after that date, see section 1000(a)(9) [title IV, § 4608(a)] of Pub. L. 106–113, set out as an Effective Date of 1999 Amendment note under section 41 of this title.