37 CFR § 1.535 - Reply by third party requester in reexamination.

---
identifier: "/us/cfr/t37/s1.535"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.535 - Reply by third party requester in  reexamination."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.535"
section_name: "Reply by third party requester in  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: "2026-04-05"
last_updated: "2026-04-05"
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"
---


# 1.535 Reply by third party requester in  reexamination.

A reply to the patent owner's statement under § 1.530 may be filed by the *ex parte* reexamination requester within two months from the date of service of the patent owner's statement. Any reply by the *ex parte* requester must be served upon the patent owner in accordance with § 1.248. If the patent owner does not file a statement under § 1.530, no reply or other submission from the *ex parte* reexamination requester will be considered.

[65 FR 76776, Dec. 7, 2000]