37 CFR § 1.919 - Filing date of request for reexamination.

---
identifier: "/us/cfr/t37/s1.919"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.919 - Filing date of request for  reexamination."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.919"
section_name: "Filing date of request for  reexamination."
chapter_name: "UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "1"
part_name: "RULES OF PRACTICE IN PATENT CASES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "35 U.S.C. 2(b)(2), unless otherwise noted."
regulatory_source: "24 FR 10332, Dec. 22, 1959, unless otherwise noted."
cfr_part: "1"
---


# 1.919 Filing date of request for  reexamination.

(a) The filing date of a request for *inter partes* reexamination is the date on which the request satisfies all the requirements for the request set forth in § 1.915.

(b) If the request is not granted a filing date, the request will be placed in the patent file as a citation of prior art if it complies with the requirements of § 1.501.

[65 FR 76777, Dec. 7, 2000, as amended at 71 FR 9262, Feb. 23, 2006]