The Manual of Patent Examining Procedure — complete chapter guide

What is the MPEP?

The Manual of Patent Examining Procedure (MPEP) is the USPTO's official, authoritative guide to the rules and procedures governing patent examination in the United States. It is written for patent examiners but serves as the primary reference for patent practitioners — attorneys, agents, and applicants — navigating U.S. patent prosecution.

The MPEP is not a law itself, but it codifies, explains, and interprets the statutes in Title 35 of the U.S. Code (35 U.S.C.), the regulations in Title 37 of the Code of Federal Regulations (37 C.F.R.), and decades of Federal Circuit and Supreme Court decisions. When an examiner issues a rejection or an applicant files a response, both sides are operating within the framework the MPEP describes.

The current version is the Ninth Edition, Revision 01.2024, updated to incorporate the America Invents Act (AIA) changes, current post-grant proceedings, recent USPTO rule changes, and Federal Circuit decisions. The USPTO publishes revisions periodically; always verify which revision is in effect at the time of your exam.

Format and structure

The MPEP is organized into 29 chapters, numbered in the 100s through 2900s, each covering a distinct area of patent practice. Within each chapter, sections are numbered hierarchically — for example, MPEP § 706.07(a) covers final rejection practice within Chapter 700. The full document exceeds 4,000 pages and includes:

• Appendix R — Title 37 C.F.R. (Patent Rules)
• Appendix L — Title 35 U.S.C. (Patent Statutes)
• Appendix AI — Administrative Instructions Under the PCT
• Appendix P — Paris Convention
• Appendix T — PCT Regulations

The MPEP as open-book exam source

Every question on the USPTO patent bar exam (the Reg. exam) is answerable using the MPEP alone. The exam is formally "open book" — a searchable electronic version of the MPEP is available directly in the Prometric testing interface throughout the entire exam. You are never required to have any section memorized.

In practice, however, the exam is 3 hours for 50 questions per session (AM and PM, 100 questions total). That leaves roughly 3.5 minutes per question — not enough time to look up every answer from scratch. Candidates who pass are the ones who know the MPEP well enough to look up only the questions they're uncertain about, and can navigate quickly to the right section when they do.

This is why chapter familiarity matters more than memorization. You don't need to know every word of MPEP § 2164.01(a) — but you need to know that enablement questions live in Chapter 2100, and that the specific enablement factors are in § 2164, so you can find them in under a minute under test conditions.

Where to get the MPEP

The USPTO provides the MPEP free of charge on its website. The full document is available as a single PDF download as well as individual chapter PDFs. The official link is:

Wysebridge subscribers also have access to the built-in eMPEP, which includes the full text with cross-linked sections, chapter-level exam frequency indicators, and the same search interface modeled after the Prometric test environment.

How to study the MPEP for the patent bar

Most candidates waste time treating the MPEP like a textbook to be read cover to cover. That approach leads to burnout and poor results. The three chapters that matter most — 2100, 700, and 600 — account for roughly 67% of all exam questions. A targeted, chapter-weighted approach gets most candidates exam-ready in 60–100 hours of focused study.

The recommended order: start with Chapter 2100 (Patentability) because it has the highest question density and the broadest conceptual range. Then move to Chapter 700 (Examination) to understand the procedural rules you'll apply under time pressure. Cover Chapter 600 (Parts of Application) next. After those three, work through the medium-frequency chapters — 1800 (PCT), 1200 (Appeal), 1400 (Correction) — before reviewing the lower-weight chapters as time allows.

Throughout, practice navigating the searchable MPEP under timed conditions. Knowing that the answer to a priority date question is somewhere in Chapter 200, section 201.06, is far more useful than having the exact text memorized — because on test day, you'll have the MPEP open in front of you.