37 CFR § 1.958 - Petition to revive inter partes reexamination prosecution terminated for lack of patent owner response.

---
identifier: "/us/cfr/t37/s1.958"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.958 - Petition to revive inter partes reexamination prosecution terminated for lack of patent owner response."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.958"
section_name: "Petition to revive inter partes reexamination prosecution terminated for lack of patent owner response."
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"
---


# 1.958 Petition to revive inter partes reexamination prosecution terminated for lack of patent owner response.

If a response by the patent owner is not timely filed in the Office, a petition may be filed pursuant to § 1.137 to revive a reexamination prosecution terminated under § 1.957(b) or limited under § 1.957(c) if the delay in response was unintentional.

[78 FR 62408, Oct. 21, 2013]