37 CFR § 41.120 - Notice of basis for relief.

---
identifier: "/us/cfr/t37/s41.120"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 41.120 - Notice of basis for relief."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "41.120"
section_name: "Notice of basis for relief."
chapter_name: "UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "41"
part_name: "PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD"
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), 3(a)(2)(A), 21, 23, 32, 41, 134, 135, and Public Law 112-29."
regulatory_source: "69 FR 50003, Aug. 12, 2004, unless otherwise noted."
cfr_part: "41"
---


# 41.120 Notice of basis for relief.

(a) The Board may require a party to provide a notice stating the relief it requests and the basis for its entitlement to relief. The Board may provide for the notice to be maintained in confidence for a limited time.

(b) *Effect.* If a notice under paragraph (a) of this section is required, a party will be limited to filing substantive motions consistent with the notice. Ambiguities in the notice will be construed against the party. A notice is not evidence except as an admission by a party-opponent.

(c) *Correction.* A party may move to correct its notice. The motion should be filed promptly after the party becomes aware of the basis for the correction. A correction filed after the time set for filing notices will only be entered if entry would serve the interests of justice.