FEDERAL · 35 U.S.C. · Chapter 2

Filing date and day for taking action

35 U.S.C. § 21
Title35Patents
Chapter2 — PROCEEDINGS IN THE PATENT AND TRADEMARK OFFICE

This text of 35 U.S.C. § 21 (Filing date and day for taking action) is published on Counsel Stack Legal Research, covering United States primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
35 U.S.C. § 21.

Text

(a)The Director may by rule prescribe that any paper or fee required to be filed in the Patent and Trademark Office will be considered filed in the Office on the date on which it was deposited with the United States Postal Service or would have been deposited with the United States Postal Service but for postal service interruptions or emergencies designated by the Director.
(b)When the day, or the last day, for taking any action or paying any fee in the United States Patent and Trademark Office falls on Saturday, Sunday, or a Federal holiday within the District of Columbia, the action may be taken, or the fee paid, on the next succeeding secular or business day.

Free access — add to your briefcase to read the full text and ask questions with AI

Related

Aqua Products, Inc. v. Matal
872 F.3d 1290 (Federal Circuit, 2017)
96 case citations
FERD. MULHENS, INC. v. Higgins
55 F. Supp. 42 (S.D. New York, 1943)
15 case citations
Ferwerda v. Coakwell
121 F. Supp. 334 (N.D. Ohio, 1953)
4 case citations
Xactware Solutions, Inc. v. Buildxact Software Limited
95 F.4th 810 (Fourth Circuit, 2024)
3 case citations
Avocent Huntsville Corp. v. Clearcube Technology, Inc.
443 F. Supp. 2d 1284 (N.D. Alabama, 2006)
3 case citations
Orion Ip, LLC v. Mercedes-Benz USA, LLC
485 F. Supp. 2d 745 (E.D. Texas, 2007)
3 case citations
Actelion Pharmaceuticals Ltd. v. Lee
216 F. Supp. 3d 680 (E.D. Virginia, 2016)
2 case citations
O'SHANNESSY v. Doll
566 F. Supp. 2d 486 (E.D. Virginia, 2008)
1 case citations
Guymon v. Vidal
(E.D. Virginia, 2025)
Arqule, Inc. v. Kappos
(District of Columbia, 2011)
Ferwerda v. Bendix Aviation Corp.
136 F. Supp. 620 (D. New Jersey, 1955)

Source Credit

History

(July 19, 1952, ch. 950, 66 Stat. 794; Pub. L. 93–596, §1, Jan. 2, 1975, 88 Stat. 1949; Pub. L. 97–247, §12, Aug. 27, 1982, 96 Stat. 321; Pub. L. 106–113, div. B, §1000(a)(9) [title IV, §4732(a)(10)(A)], Nov. 29, 1999, 113 Stat. 1536, 1501A–582; Pub. L. 107–273, div. C, title III, §13206(b)(1)(B), Nov. 2, 2002, 116 Stat. 1906.)

Editorial Notes

Historical and Revision Notes
Based on Title 35, U.S.C., 1946 ed., §21 (Mar. 2, 1927, ch. 273, §14, 44 Stat. 1337).
"Fixed by statute" is omitted from the corresponding section of the existing statute as unnecessary. Saturday is added as a day on which action need not be taken.

Editorial Notes

Amendments
2002—Subsec. (a). Pub. L. 107–273 made technical correction to directory language of Pub. L. 106–113. See 1999 Amendment note below.
1999—Subsec. (a). Pub. L. 106–113, as amended by Pub. L. 107–273, substituted "Director" for "Commissioner" in two places.
1982—Pub. L. 97–247 substituted "Filing date and day for taking action" for "Day for taking action falling on Saturday, Sunday, or holiday" as section catchline, added subsec. (a), redesignated existing provisions as subsec. (b) and inserted "Federal" after "Sunday, or a".
1975—Pub. L. 93–596 substituted "Patent and Trademark Office" for "Patent Office".

Statutory Notes and Related Subsidiaries

Effective Date of 1999 Amendment
Amendment by Pub. L. 106–113 effective 4 months after Nov. 29, 1999, see section 1000(a)(9) [title IV, §4731] of Pub. L. 106–113, set out as a note under section 1 of this title.

Effective Date of 1982 Amendment
Amendment by Pub. L. 97–247 effective six months after Aug. 27, 1982, see section 17(c) of Pub. L. 97–247, set out as an Effective Date note under section 294 of this title.

Effective Date of 1975 Amendment
Amendment by Pub. L. 93–596 effective Jan. 2, 1975, see section 4 of Pub. L. 93–596, set out as a note under section 1111 of Title 15, Commerce and Trade.

Emergency Relief From Postal Situation Affecting Patent Cases
Relief as to filing date of patent application or patent and excusal of delayed fees or actions affected by postal situation beginning on Mar. 18, 1970, and ending on or about Mar. 30, 1970, see note set out under section 111 of this title.

Cite This Page — Counsel Stack

Bluebook (online)
35 U.S.C. § 21, Counsel Stack Legal Research, https://law.counselstack.com/usc/35/21.