---
kind: "section"
citation: "37 C.F.R. § 1.913"
title: "37"
number: "1.913"
heading: "Persons eligible to file, and time for filing, a request for inter partes reexamination."
url: "https://uscodex.org/cfr/37/1.913"
---

# §1.913. Persons eligible to file, and time for filing, a request for inter partes reexamination.

- (a) Except as provided for in [§ 1.907](/cfr/37/1.907.md) and in [paragraph (b)](#b) of this section, any person other than the patent owner or its privies may, at any time during the period of enforceability of a patent which issued from an original application filed in the United States on or after November 29, 1999, file a request for inter partes reexamination by the Office of any claim of the patent on the basis of prior art patents or printed publications cited under [§ 1.501](/cfr/37/1.501.md).
- (b) Any request for an inter partes reexamination submitted on or after September 16, 2012, will not be accorded a filing date, and any such request will not be granted.

## Notes

### Amendments

[76 FR 59057, Sept. 23, 2011]

### Source

Source: 65 FR 76777, Dec. 7, 2000, unless otherwise noted.

### Authority

Authority: 35 U.S.C. 2(b)(2), unless otherwise noted.

### Source

Source: 24 FR 10332, Dec. 22, 1959, unless otherwise noted.

### Amendments

[76 FR 59057, Sept. 23, 2011]