# MPEP § 1400.01: Introduction

> Federal · Agency guidance · In force

URL: https://www.frixlaw.com/law-library/statutes/MPEP_S1400.01

## Section

- **Citation:** MPEP § 1400.01
- **Heading:** Introduction
- **Jurisdiction:** Federal
- **Kind:** Agency guidance
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** USPTO MPEP / Chapter 1400 - Correction of Patents / MPEP § 1400.01

## Text

A patent may be corrected or amended in eight ways, namely by:
(1) reissue,
(2) the issuance of a certificate of correction which becomes a part of
the patent,
(3) disclaimer,
(4) reexamination,
(5) supplemental examination,
(6)
inter partes
review,
(7) post grant review, and
(8) covered business method review.
The first three ways are discussed in this chapter. The fourth way
(reexamination) is discussed in
MPEP Chapter 2200
for
ex
parte
reexamination and
MPEP Chapter 2600
for
inter
partes
reexamination requests (as of September 16, 2012 no new requests may be
filed). The fifth way (supplemental examination) is discussed in
MPEP Chapter
2800
. The sixth, seventh, and eighth ways
(inter
partes
review, post grant review, and covered business method review) are
discussed in the Office Patent Trial Practice Guide available at
www.uspto.gov/patents/ptab/resources
.
No new petitions for covered business method reviews can be
filed on or after September 16, 2020. Proceedings instituted on covered business method
review petitions filed before September 16, 2020 will continue after September 16, 2020
until the proceeding is concluded by issuance of a certificate or otherwise terminated.
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## Nearby sections

- [MPEP § 1400.01 Introduction](https://www.frixlaw.com/law-library/statutes/MPEP_S1400.01.md)
- [MPEP § 1401 Reissue](https://www.frixlaw.com/law-library/statutes/MPEP_S1401.md)
- [MPEP § 1402 Grounds for Filing](https://www.frixlaw.com/law-library/statutes/MPEP_S1402.md)
- [MPEP § 1403 Diligence in Filing](https://www.frixlaw.com/law-library/statutes/MPEP_S1403.md)
- [MPEP § 1404 Submission of Papers Where Reissue Patent Is in Litigation](https://www.frixlaw.com/law-library/statutes/MPEP_S1404.md)
- [MPEP § 1405 Reissue and Patent Term](https://www.frixlaw.com/law-library/statutes/MPEP_S1405.md)
- [MPEP § 1406 Citation and Consideration of References Cited in Original Patent](https://www.frixlaw.com/law-library/statutes/MPEP_S1406.md)
- [MPEP § 1410 Content of Reissue Application](https://www.frixlaw.com/law-library/statutes/MPEP_S1410.md)
- [MPEP § 1410.01 Reissue Applicant and Inventor's Oath or Declaration](https://www.frixlaw.com/law-library/statutes/MPEP_S1410.01.md)
- [MPEP § 1410.02 Assignee Consent to the Reissue](https://www.frixlaw.com/law-library/statutes/MPEP_S1410.02.md)
- [MPEP § 1411 Form of Specification](https://www.frixlaw.com/law-library/statutes/MPEP_S1411.md)
- [MPEP § 1411.01 Certificate of Correction or Disclaimer in Original Patent](https://www.frixlaw.com/law-library/statutes/MPEP_S1411.01.md)
- [MPEP § 1411.02 New Matter](https://www.frixlaw.com/law-library/statutes/MPEP_S1411.02.md)
- [MPEP § 1412 Content of Claims](https://www.frixlaw.com/law-library/statutes/MPEP_S1412.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/MPEP_S1400.01. Check the current official text before relying on it. Not legal advice.