What Is the MPEP and How Is It Tested
The MPEP (Manual of Patent Examining Procedure) is the official, ~3,000-page reference manual published by the USPTO that instructs patent examiners and practitioners on the laws (35 U.S.C.), federal regulations (37 CFR), and case law governing U.S. patent prosecution—and it serves as the sole open-book reference on the Patent Bar Exam.
Key 2026 Takeaways at a Glance
- ✓ Current Tested Edition: MPEP Ninth Edition, Revision 01.2024 (published November 2024).
- ✓ Structure: Chapters 0100 through 2900, plus Appendices L (35 U.S.C. Patent Laws), R (37 CFR Patent Rules), T (PCT), and AI.
- ✓ Knowing which MPEP chapter houses a topic is 80% of the lookup battle during the Prometric exam.
Practice MPEP 700 Examination Practice Questions (MPEP Rev. 01.2024 Cited)
Directory of Key MPEP Chapters Tested on the Patent Bar
While the MPEP has 29 chapters, memorizing the subject directory of the 12 core chapters below allows you to open the right PDF immediately on exam day:
| Chapter | Official Title | Key Exam Doctrines |
|---|---|---|
| MPEP 200 | Types and Status of Application; Benefit and Priority Claims | 111(a)/(b), 119(a)-(e), 120, 4/16-month rule, ADS priority |
| MPEP 500 | Receipt and Handling of Mail and Papers | Priority Mail Express (1.10), Certificate of Mailing (1.8), Filing Date |
| MPEP 600 | Parts, Form, and Content of Application | Oath/Substitute Statement (1.63/1.64), ADS (1.76), IDS (1.97/1.98) |
| MPEP 700 | Examination of Applications | Finality, SSPs, RCE (1.114), Affidavits (1.130/1.131/1.132), Abandonment/Revival |
| MPEP 800 | Restriction in Applications; Double Patenting | Independent/distinct, election w/ traverse, 121 safe harbor, terminal disclaimers |
| MPEP 1200 | Appeal | Notice of Appeal, Appeal Brief, Pre-Appeal conference, New Ground in Answer |
| MPEP 1400 | Correction of Patents | Certificates of Correction (254/255), Reissue (251), 2-year broadening, recapture |
| MPEP 1800 | Patent Cooperation Treaty | RO/US, ISR (3/9 mos), Art. 19 vs. 34, 30-month US National Stage (35 U.S.C. 371) |
| MPEP 2000 | Duty of Disclosure | 37 CFR 1.56 individuals bound, materiality definition, cumulative info |
| MPEP 2100 | Patentability | 35 U.S.C. 101, AIA & Pre-AIA 102, 103 obviousness, 112(a)/(b)/(f) |
| MPEP 2200 | Citation of Prior Art and Ex Parte Reexamination of Patents | 35 U.S.C. 301/302, SNQ (3 mos), patents/printed pubs only, no broadening |
How This Topic Fits Into the 2026 USPTO Registration Examination Blueprint
Every question on the USPTO Patent Bar Exam traces directly back to three primary legal authorities loaded onto Prometric testing workstations: Title 35 of the United States Code (35 U.S.C. 101 Subject Matter Eligibility, 35 U.S.C. 102 Novelty & Prior Art, 35 U.S.C. 103 Obviousness, and 35 U.S.C. 112 Specification & Claims), Title 37 of the Code of Federal Regulations (37 CFR Parts 1, 11, 41, and 42), and the Manual of Patent Examining Procedure (MPEP Ninth Edition, Rev. 01.2024).
Prometric Exam Day Execution Checklist
During each 3-hour, 50-question Prometric session, you have exactly 3.6 minutes (216 seconds) per question. High-scoring candidates answer 35 to 40 questions on their first pass using memorized rules from MPEP 700, MPEP 200, MPEP 600, and MPEP 1800, and reserve the final 50–60 minutes to look up marked edge-case exceptions in the on-screen MPEP PDF viewer.
AIA vs. Pre-AIA & Deadline Verification Protocol
Before selecting an option on any Patent Bar question, run a three-point check: (1) check the effective filing date against the March 16, 2013 AIA transition date, (2) verify whether the deadline is extendable under 37 CFR 1.136(a) or non-extendable by statute (such as the 12-month provisional period, 6-month maximum reply cap, or 2-year broadening reissue rule in MPEP 1400), and (3) check whether the proceeding is before the examiner, the PTAB (MPEP 1200), or Ex Parte Reexamination (MPEP 2200).
To turn passive reading into a passing 70%+ score (63 out of 90 scored questions), pair this guide with active question drills in our Free 50-Question Practice Hub, review worked hypotheticals on our Example Questions page, and benchmark your lookup speed in the Timed Patent Bar Mock Exam Simulator.
Frequently Asked Questions
Does the MPEP have the force of law?
As stated in the Foreword to the MPEP, the MPEP does not have the force of law, but it is entitled to judicial notice as an official interpretation of statutes or regulations by the USPTO (provided it does not conflict with 35 U.S.C. or 37 CFR). On the Patent Bar Exam, the MPEP is treated as the authoritative rulebook.
How often is the MPEP updated?
The USPTO typically updates the Ninth Edition MPEP every 1 to 2 years. The current active revision is Revision 01.2024 (published November 2024).
Related Patent Bar Guides
- Is the Patent Bar Exam Open Book? →Yes, the Patent Bar Exam is open book—but only via the on-screen Prometric PDF viewer of MPEP Rev. 01.2024. Learn how the search tool works and how to pace lookups.
- What Is on the Patent Bar Exam? →See exactly what is on the 2026 USPTO Patent Bar Exam: MPEP Ninth Edition Rev. 01.2024 chapter weights, 35 U.S.C. 101/102/103/112, prosecution, PCT & PTAB appeals.
- Patent Bar Exam Study Guide (Free) →Free 2026 USPTO Patent Bar Exam study guide covering MPEP Rev. 01.2024 chapters 2100, 700, 200, 600, 1800, 1200, 800, 1400, 2000 & 2200.
- Patent Bar Exam Study Materials →Complete checklist of official USPTO Patent Bar Exam study materials (MPEP Rev. 01.2024, OED GRB, 35 U.S.C., 37 CFR) and active-recall question banks.
Practice Questions by MPEP Topic
- 35 U.S.C. 101 Eligibility 35 U.S.C. § 101 & MPEP §§ 2104–2107 →
- 35 U.S.C. 102 Novelty 35 U.S.C. § 102 & MPEP §§ 2117–2159 →
- 35 U.S.C. 103 Obviousness 35 U.S.C. § 103 & MPEP §§ 2141–2146 →
- 35 U.S.C. 112 Specification 35 U.S.C. § 112 & MPEP §§ 2161–2186 →
- MPEP 700 Examination MPEP Chapter 700 & 37 CFR §§ 1.104–1.138 →
- MPEP 600 Application Parts MPEP Chapter 600 & 37 CFR §§ 1.51–1.99 →