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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 10:51:44 -04:00

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LegalText 35 U.S.C. § 307 Certificate of patentability, unpatentability, and claim cancellation us united_states_code code_section 35 PATENTS 30 PRIOR ART CITATIONS TO OFFICE AND EX PARTE REEXAMINATION OF PATENTS 307 35 U.S.C. § 307 current 119-100 2026-06-26 official https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc35@119-100.zip /us/usc/t35/s307 data/legal/raw/us/code/title-35/usc35.xml c968909aff6df5ef4af835563e88c5403d8aa168fbcc2a540d14383267c61bf0 736cab508592dcf50013a1aed5ab108f72fd8493e76afc46848cdc35da38bbe3 53a7e8e343a9c02ac5a7119527a65e84316e9ee72d89f2db0c692ca8a21b3e2a 2026-07-04 official
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35 U.S.C. § 307 - Certificate of patentability, unpatentability, and claim cancellation

Text

(a) In a reexamination proceeding under this chapter, when the time for appeal has expired or any appeal proceeding has terminated, the Director will issue and publish a certificate canceling any claim of the patent finally determined to be unpatentable, confirming any claim of the patent determined to be patentable, and incorporating in the patent any proposed amended or new claim determined to be patentable.

(b) Any proposed amended or new claim determined to be patentable and incorporated into a patent following a reexamination proceeding will have the same effect as that specified in section 252 for reissued patents on the right of any person who made, purchased, or used within the United States, or imported into the United States, anything patented by such proposed amended or new claim, or who made substantial preparation for the same, prior to issuance of a certificate under the provisions of subsection (a) of this section.

(Added Pub. L. 96517, § 1, Dec. 12, 1980, 94 Stat. 3016; amended Pub. L. 103465, title V, § 533(b)(8), Dec. 8, 1994, 108 Stat. 4990; Pub. L. 106113, div. B, § 1000(a)(9) [title IV, § 4732(a)(10)(A)], Nov. 29, 1999, 113 Stat. 1536, 1501A582; Pub. L. 107273, div. C, title III, § 13206(b)(1)(B), Nov. 2, 2002, 116 Stat. 1906; Pub. L. 11229, § 20(j), Sept. 16, 2011, 125 Stat. 335.)

Notes

Editorial Notes

Amendments2011—Subsec. (b). Pub. L. 11229 struck out “of this title” after “252”. 2002—Subsec. (a). Pub. L. 107273 made technical correction to directory language of Pub. L. 106113. See 1999 Amendment note below. 1999—Subsec. (a). Pub. L. 106113, as amended by Pub. L. 107273, substituted “Director” for “Commissioner”. 1994—Subsec. (b). Pub. L. 103465 substituted “used within the United States, or imported into the United States, anything” for “used anything”.

Statutory Notes and Related Subsidiaries

Effective Date of 2011 AmendmentAmendment by Pub. L. 11229 effective upon the expiration of the 1-year period beginning on Sept. 16, 2011, and applicable to proceedings commenced on or after that effective date, see section 20(l) of Pub. L. 11229, set out as a note under section 2 of this title.

Effective Date of 1999 AmendmentAmendment by Pub. L. 106113 effective 4 months after Nov. 29, 1999, see section 1000(a)(9) [title IV, § 4731] of Pub. L. 106113, set out as a note under section 1 of this title.

Effective Date of 1994 AmendmentAmendment by Pub. L. 103465 effective on date that is one year after date on which the WTO Agreement enters into force with respect to the United States [Jan. 1, 1995], with provisions relating to earliest filed patent application, see section 534(a), (b)(3) of Pub. L. 103465, set out as a note under section 154 of this title.

Effective DateSection effective July 1, 1981, and applicable to patents in force as of July 1, 1981, or issued thereafter, see section 8(b) of Pub. L. 96517, set out as an Effective Date of 1980 Amendment note under section 41 of this title.