MPEP chapters
Answer in brief
The MPEP has 29 chapters, from 100 to 2900. For the patent bar, Chapter 2100 (Patentability) is the most tested at roughly 32% of questions, followed by 700 (Examination, ~21%) and 600 (Parts of the Application, ~14%).
Titles from the USPTO; weights are Wysebridge estimates.
Every chapter
| Ch. | Title | Est. exam weight |
|---|---|---|
| 100 | Secrecy, Access, National Security, and Foreign Filing | ~1% |
| 200 | Types and Status of Application; Benefit and Priority Claims | ~3% |
| 300 | Ownership and Assignment | ~1% |
| 400 | Representative of Applicant or Owner | ~2% |
| 500 | Receipt and Handling of Mail and Papers | ~2% |
| 600 | Parts, Form, and Content of Application | ~14% |
| 700 | Examination of Applications | ~21% |
| 800 | Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting | ~2% |
| 900 | Prior Art, Search, Classification, and Routing | ~2% |
| 1000 | Matters Decided by Various U.S. Patent and Trademark Office Officials | ~1% |
| 1100 | Statutory Invention Registration (SIR); Pre-Grant Publication (PGPub) and Preissuance Submissions | <1% |
| 1200 | Appeal | ~4% |
| 1300 | Allowance and Issue | ~2% |
| 1400 | Correction of Patents | ~4% |
| 1500 | Design Patents | ~2% |
| 1600 | Plant Patents | <1% |
| 1700 | Miscellaneous | <1% |
| 1800 | Patent Cooperation Treaty | ~6% |
| 1900 | Protest | <1% |
| 2000 | Duty of Disclosure | ~2% |
| 2100 | Patentability | ~32% |
| 2200 | Citation of Prior Art and Ex Parte Reexamination of Patents | ~2% |
| 2300 | Interference and Derivation Proceedings | ~1% |
| 2400 | Biotechnology | ~1% |
| 2500 | Maintenance Fees | ~1% |
| 2600 | Optional Inter Partes Reexamination | ~1% |
| 2700 | Patent Terms, Adjustments, and Extensions | ~1% |
| 2800 | Supplemental Examination | <1% |
| 2900 | International Design Applications | <1% |
Chapter links open the free full text in Wysebridge's MPEP Center.
Sources for this entry
- Manual of Patent Examining Procedure (MPEP) USPTO
The examination manual the patent bar is tested on; open book during the exam. - Wysebridge MPEP Center Wysebridge (publisher of this site)
The full MPEP (9th Ed., Rev. 01.2024) free to read, with Wysebridge's estimated patent bar weight for each chapter.
Practical guidance is original editorial content. Company-published figures are the company's own claims and are labeled as such.
Continue this reading path
MPEP 2100: PatentabilityMPEP 700: Examination of ApplicationsMPEP 600: Parts, Form, and Content of Application
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MPEP.net. “MPEP chapters.” Wysebridge Reference. Content reviewed 9 November 2026.
https://mpep.net/mpep-chapters/