Manual of Patent Examining Procedure

Ninth Edition, Revision 10.2019 (June 2020)

An efficient and user-friendly searchable electronic replication of the Manual of Patent Examining Procedure (MPEP). Updated to the latest edition on September 26, 2020. ℹ️ Provided as a courtesy by software patent attorney, Rohit Chhabra.

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Chapter 100

Secrecy, Access, National Security, and Foreign Filing

Chapter 200

Types and Status of Application; Benefit and Priority Claims

Chapter 300

Ownership and Assignment

Chapter 400

Representative of Applicant or Owner

Chapter 500

Receipt and Handling of Mail and Papers

Chapter 600

Parts, Form, and Content of Application

Chapter 700

Examination of Applications (Part I)

Chapter 700

Examination of Applications (Part II)

Chapter 800

Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting

Chapter 900

Prior Art, Classification, and Search

Chapter 1000

Matters Decided by Various U.S. Patent and Trademark Office Officials

Chapter 1100

Statutory Invention Registration (SIR); Pre-Grant Publication (PGPub) and Preissuance Submissions

Chapter 1200


Chapter 1300

Allowance and Issue

Chapter 1400

Correction of Patents

Chapter 1500

Design Patents

Chapter 1600

Plant Patents

Chapter 1700


Chapter 1800

Patent Cooperation Treaty

Chapter 1900


Chapter 2000

Duty of Disclosure

Chapter 2100

Patentability (Part I)

Chapter 2100

Patentability (Part II)

Chapter 2200

Citation of Prior Art and Ex Parte Reexamination of Patents

Chapter 2300

Interference and Derivation Proceedings

Chapter 2400


Chapter 2500

Maintenance Fees

Chapter 2600

Optional Inter Partes Reexamination

Chapter 2700

Patent Terms and Extensions

Chapter 2800

Supplemental Examination

Chapter 2900

International Design Applications

Our search engine may be beneficial to patent practitioners and patent bar students. Results generated by this engine would generally lead you to the relevant topic faster than by any other conventional means (e.g., USTPO website, Google, Bing, etc.)

Note: Internal cross reference links to other sections of the MPEP (from within a chapter) have been disabled due to the updates. All links from this page or the search results should work as intended. We apologize for any inconvenience. 

Disclaimer: This version of the MPEP is provided as a courtesy, free of cost, by Chhabra Law Firm. It is provided “as is,” without any warranties towards the accuracy of the contents thereof or the ability of our search-engine to perform in a satisfactory manner, and is provided here for educational and informational purposes only.  No claim of copyright ownership is made to underlying materials or contents of the MPEP, statutes, regulations, or court cases that are presented herein. Please refer to the official manual available at to verify the contents presented herein.
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