37 CFR § 1.143 - Reconsideration of requirement.

---
identifier: "/us/cfr/t37/s1.143"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.143 - Reconsideration of requirement."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.143"
section_name: "Reconsideration of requirement."
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"
---


# 1.143 Reconsideration of requirement.

If the applicant disagrees with the requirement for restriction, he may request reconsideration and withdrawal or modification of the requirement, giving the reasons therefor. (See § 1.111.) In requesting reconsideration the applicant must indicate a provisional election of one invention for prosecution, which invention shall be the one elected in the event the requirement becomes final The requirement for restriction will be reconsidered on such a request. If the requirement is repeated and made final the examiner will at the same time act on the claims to the invention elected.