37 CFR § 1.927 - Petition to review refusal to order reexamination.

---
identifier: "/us/cfr/t37/s1.927"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.927 - Petition to review refusal to order  reexamination."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.927"
section_name: "Petition to review refusal to order  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"
---


# 1.927 Petition to review refusal to order  reexamination.

The third party requester may seek review by a petition to the Director under § 1.181 within one month of the mailing date of the examiner's determination refusing to order *inter partes* reexamination. Any such petition must comply with § 1.181(b). If no petition is timely filed or if the decision on petition affirms that a reasonable likelihood that the requester will prevail with respect to at least one of the claims challenged in the request has not been established, the determination shall be final and nonappealable.

[76 FR 59058, Sept. 23, 2011]