37 CFR § 1.144 - Petition from requirement for restriction.

---
identifier: "/us/cfr/t37/s1.144"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.144 - Petition from requirement for restriction."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.144"
section_name: "Petition from requirement for restriction."
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"
---


# 1.144 Petition from requirement for restriction.

After a final requirement for restriction, the applicant, in addition to making any reply due on the remainder of the action, may petition the Director to review the requirement. Petition may be deferred until after final action on or allowance of claims to the invention elected, but must be filed not later than appeal. A petition will not be considered if reconsideration of the requirement was not requested (see § 1.181).

[62 FR 53195, Oct. 10, 1997]