Search the MPEP

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

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


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