Title 35PatentsRelease 119-73

§120 Benefit of earlier filing date in the United States

Title 35 › Part PART II— - PATENTABILITY OF INVENTIONS AND GRANT OF PATENTS › Chapter CHAPTER 11— - APPLICATION FOR PATENT › § 120

Last updated Apr 6, 2026|Official source

Summary

A later U.S. patent application that shows the same invention as an earlier U.S. filing (disclosed as required by section 112(a), except best mode, or under sections 363 or 385) and names the same inventor can use the earlier filing date for that invention. It must be filed before the first application is patented, abandoned, or its proceedings end, and must include a clear reference to the earlier application. The required reference must be submitted while the later application is still pending, at the time the Director requires. If not filed on time, the Director may treat that as giving up the earlier date. The Director can set rules to accept a late but unintentional reference and may require the fee in section 41(a)(7).

Full Legal Text

Title 35, §120

Patents — Source: USLM XML via OLRC

An application for patent for an invention disclosed in the manner provided by section 112(a) (other than the requirement to disclose the best mode) in an application previously filed in the United States, or as provided by section 363 or 385, which names an inventor or joint inventor in the previously filed application shall have the same effect, as to such invention, as though filed on the date of the prior application, if filed before the patenting or abandonment of or termination of proceedings on the first application or on an application similarly entitled to the benefit of the filing date of the first application and if it contains or is amended to contain a specific reference to the earlier filed application. No application shall be entitled to the benefit of an earlier filed application under this section unless an amendment containing the specific reference to the earlier filed application is submitted at such time during the pendency of the application as required by the Director. The Director may consider the failure to submit such an amendment within that time period as a waiver of any benefit under this section. The Director may establish procedures, including the requirement for payment of the fee specified in section 41(a)(7), to accept an unintentionally delayed submission of an amendment under this section.

Legislative History

Notes & Related Subsidiaries

Historical and Revision Notes

This section represents present law not expressed in the statute, except for the added requirement that the first application must be specifically mentioned in the second.

Editorial Notes

Amendments

2012—Pub. L. 112–211, § 202(b)(3), substituted “including the requirement for payment of the fee specified in section 41(a)(7)” for “including the payment of a surcharge”. Pub. L. 112–211, § 102(5), substituted “section 363 or 385” for “section 363”. 2011—Pub. L. 112–29, § 20(j), struck out “of this title” after “363”. Pub. L. 112–29, § 15(b), substituted “section 112(a) (other than the requirement to disclose the best mode)” for “the first paragraph of section 112 of this title”. Pub. L. 112–29, § 3(f), substituted “which names an inventor or joint inventor” for “which is filed by an inventor or inventors named”. 1999—Pub. L. 106–113 inserted at end “No application shall be entitled to the benefit of an earlier filed application under this section unless an amendment containing the specific reference to the earlier filed application is submitted at such time during the pendency of the application as required by the Director. The Director may consider the failure to submit such an amendment within that time period as a waiver of any benefit under this section. The Director may establish procedures, including the payment of a surcharge, to accept an unintentionally delayed submission of an amendment under this section.” 1984—Pub. L. 98–622 substituted “which is filed by an inventor or inventors named in the previously filed application” for “by the same inventor”. 1975—Pub. L. 94–131 inserted “, or as provided by section 363 of this title,” after “filed in the United States”.

Statutory Notes and Related Subsidiaries

Effective Date

of 2012 AmendmentAmendment by section 102(5) of Pub. L. 112–211 effective on the later of the date that is 1 year after Dec. 18, 2012, or the date that the Geneva Act of the Hague Agreement Concerning the International Registration of Industrial Designs enters into force with respect to the United States (May 13, 2015), and applicable only to certain applications filed on and after that

Effective Date

and patents issuing thereon, see section 103 of Pub. L. 112–211, set out as a note under section 100 of this title. Amendment by section 202(b)(3) of Pub. L. 112–211 effective on the date that is 1 year after Dec. 18, 2012, applicable to patents issued before, on, or after that

Effective Date

and patent applications pending on or filed after that

Effective Date

, and not effective with respect to patents in litigation commenced before that

Effective Date

, see section 203 of Pub. L. 112–211, set out as an

Effective Date

note under section 27 of this title.

Effective Date

of 2011 AmendmentAmendment by section 3(f) of Pub. L. 112–29 effective upon the expiration of the 18-month period beginning on Sept. 16, 2011, and applicable to certain applications for patent and any patents issuing thereon, see section 3(n) of Pub. L. 112–29, set out as an

Effective Date

of 2011 Amendment;

Savings Provision

s note under section 100 of this title. Amendment by section 15(b) of Pub. L. 112–29 effective on Sept. 16, 2011, and applicable to proceedings commenced on or after that date, see section 15(c) of Pub. L. 112–29, set out as a note under section 119 of this title. Amendment by section 20(j) of Pub. L. 112–29 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. 112–29, set out as a note under section 2 of this title.

Effective Date

of 1999 AmendmentAmendment by Pub. L. 106–113 effective Nov. 29, 2000, and applicable only to applications (including international applications designating the United States) filed on or after that date, see section 1000(a)(9) [title IV, § 4508] of Pub. L. 106–113, as amended, set out as a note under section 10 of this title.

Effective Date

of 1984 AmendmentAmendment by Pub. L. 98–622 applicable to all United States patents granted before, on, or after Nov. 8, 1984, and to all applications for United States patents pending on or filed after that date, except as otherwise provided, see section 106 of Pub. L. 98–622, set out as a note under section 103 of this title.

Effective Date

of 1975 AmendmentAmendment by Pub. L. 94–131 effective Jan. 24, 1978, and applicable on and after that date to patent applications filed in the United States and to international applications, where applicable, see section 11 of Pub. L. 94–131, set out as an

Effective Date

note under section 351 of this title.

Reference

Citations & Metadata

Citation

35 U.S.C. § 120

Title 35Patents

Last Updated

Apr 6, 2026

Release point: 119-73