MPEP 2200 – Citation of Prior Art and Ex Parte Reexamination of Patents

This page consolidates and annotates enforceable requirements under MPEP 2200 — Citation of Prior Art and Ex Parte Reexamination of Patents, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Metric	Value	Share of total
Rules extracted	2,268	6.0%
Citations to Authorities	MPEP2,943 USC1,231 CFR3,236 PCT3	6.0%
Avg citations per rule	3.27
Topics covered	215 primary + 337 secondary	22.7%

Pages in this chapter

Page
MPEP § 2201 — Introduction22 rules
MPEP § 2202 — Citation of Prior Art and Written Statements27 rules
MPEP § 2203 — Persons Who May Cite Prior Art or Written Statements11 rules
MPEP § 2204 — Time for Filing Prior Art or Section 301 Written Statements4 rules
MPEP § 2205 — Content of Prior Art or Section 301 Written Statements29 rules
MPEP § 2206 — Submission and Handling of Prior Art or Section 301 Written Statements30 rules
MPEP § 2207 — Entry of Court Decision in Patent File16 rules
MPEP § 2208 — Service of Prior Art or Section 301 Written Statements on Patent Owner3 rules
MPEP § 2209 — Ex Parte Reexamination16 rules
MPEP § 2210 — Request for Ex Parte Reexamination under 35 U.S.C. 30232 rules
MPEP § 2211 — Time for Requesting Ex Parte Reexamination under 35 U.S.C. 3027 rules
MPEP § 2212 — Persons Who May File a Request for Ex Parte Reexamination under 35 U.S.C. 30210 rules
MPEP § 2212.01 — Inquiries from Persons Other Than the Patent Owner7 rules
MPEP § 2213 — Representative of Requester8 rules
MPEP § 2214 — Content of Request for Ex Parte Reexamination Filed under 35 U.S.C. 30289 rules
MPEP § 2215 — Fee for Requesting Ex Parte Reexamination under 35 U.S.C. 30229 rules
MPEP § 2216 — Substantial New Question of Patentability15 rules
MPEP § 2217 — Statement Applying Prior Art in a Request Filed under 35 U.S.C. 30258 rules
MPEP § 2218 — Copies of Prior Art11 rules
MPEP § 2219 — Copy of Printed Patent4 rules
MPEP § 2220 — Certificate of Service8 rules
MPEP § 2221 — Amendments Included in Request Filed under 35 U.S.C. 302 by Patent Owner6 rules
MPEP § 2222 — Address of Patent Owner8 rules
MPEP § 2223 — Withdrawal of Attorney or Agent3 rules
MPEP § 2224 — Correspondence15 rules
MPEP § 2225 — Untimely Paper Filed Prior to Order under 35 U.S.C. 3045 rules
MPEP § 2226 — Initial Processing of Request for Ex Parte Reexamination Filed under 35 U.S.C. 3020 rules
MPEP § 2227 — Incomplete Request for Ex Parte Reexamination Filed under 35 U.S.C. 30221 rules
MPEP § 2229 — Notice of Request under 35 U.S.C. 302 for Ex Parte Reexamination in Official Gazette6 rules
MPEP § 2230 — Constructive Notice to Patent Owner3 rules
MPEP § 2231 — Processing of Request Corrections1 rules
MPEP § 2232 — Public Access to Reexaminations Filed under 35 U.S.C. 3023 rules
MPEP § 2232.01 — Determining if a Reexamination Request Was Filed under 35 U.S.C. 302 for a Patent2 rules
MPEP § 2233 — Processing in Central Reexamination Unit and Technology Center7 rules
MPEP § 2234 — Entry of Amendments8 rules
MPEP § 2235 — Record Systems18 rules
MPEP § 2236 — Assignment of Reexamination26 rules
MPEP § 2237 — Transfer Procedure6 rules
MPEP § 2238 — Time Reporting1 rules
MPEP § 2239 — Reexamination Ordered at the Director’s Initiative12 rules
MPEP § 2240 — Decision on Request Filed under 35 U.S.C. 30273 rules
MPEP § 2241 — Time for Deciding Request Filed under 35 U.S.C. 3024 rules
MPEP § 2242 — Criteria for Deciding Request Filed under 35 U.S.C. 30242 rules
MPEP § 2243 — Claims Considered in Deciding Request Filed under 35 U.S.C. 30214 rules
MPEP § 2244 — Prior Art on Which the Determination Is Based in Requests Filed under 35 U.S.C. 30210 rules
MPEP § 2245 — Processing of Decision2 rules
MPEP § 2246 — Decision Ordering Reexamination under 35 U.S.C. 30459 rules
MPEP § 2247 — Decision under 35 U.S.C. 303 on Request for Reexamination filed Under 35 U.S.C. 302, Request Denied2 rules
MPEP § 2247.01 — Examples of Decisions on Request for Reexamination4 rules
MPEP § 2248 — Petition From Denial of Request Filed Under 35 U.S.C. 30219 rules
MPEP § 2249 — Patent Owner’s Statement in Reexaminations Filed Under 35 U.S.C. 30225 rules
MPEP § 2250 — Amendment by Patent Owner125 rules
MPEP § 2250.01 — Correction of Patent Drawings17 rules
MPEP § 2250.02 — Correction of Inventorship6 rules
MPEP § 2250.03 — Fees for Adding Claims and for Filing a Petition29 rules
MPEP § 2251 — Reply by Third Party Requester12 rules
MPEP § 2252 — Consideration of Statement and Reply9 rules
MPEP § 2253 — Consideration by Examiner5 rules
MPEP § 2254 — Conduct of Ex Parte Reexamination Proceedings35 rules
MPEP § 2255 — Who Reexamines2 rules
MPEP § 2256 — Prior Art Patents and Printed Publications Reviewed by Examiner in Reexamination14 rules
MPEP § 2257 — Listing of Prior Art3 rules
MPEP § 2258 — Scope of Ex Parte Reexamination148 rules
MPEP § 2258.01 — Use of Previously Cited/Considered Art in Rejections30 rules
MPEP § 2258.02 — Claiming Foreign Priority and Domestic Benefit in Reexamination72 rules
MPEP § 2259 — Res Judicata and Collateral Estoppel in Reexamination Proceedings8 rules
MPEP § 2260 — Office Actions6 rules
MPEP § 2260.01 — Dependent Claims6 rules
MPEP § 2261 — Special Status for Action0 rules
MPEP § 2262 — Form and Content of Office Action22 rules
MPEP § 2263 — Time for Response2 rules
MPEP § 2264 — Mailing of Office Action9 rules
MPEP § 2265 — Extension of Time7 rules
MPEP § 2266 — Responses49 rules
MPEP § 2266.01 — Submission Not Fully Responsive to Non-Final Office Action39 rules
MPEP § 2266.02 — Examiner Issues Notice of Defective Paper in Ex Parte Reexamination11 rules
MPEP § 2266.03 — Service of Papers24 rules
MPEP § 2267 — Handling of Inappropriate or Untimely Filed Papers12 rules
MPEP § 2268 — Petition for Entry of Late Papers for Revival of Reexamination Proceeding34 rules
MPEP § 2269 — Reconsideration4 rules
MPEP § 2270 — Clerical Handling6 rules
MPEP § 2271 — Final Action20 rules
MPEP § 2271.01 — Panel Review20 rules
MPEP § 2272 — After Final Practice33 rules
MPEP § 2273 — Appeal in Ex Parte Reexamination23 rules
MPEP § 2274 — Appeal Brief64 rules
MPEP § 2275 — Examiner’s Answer24 rules
MPEP § 2276 — Oral Hearing6 rules
MPEP § 2277 — Board Decision1 rules
MPEP § 2278 — Action Following Decision21 rules
MPEP § 2279 — Appeal to Courts10 rules
MPEP § 2280 — Information Material to Patentability in Reexamination Proceeding Filed under 35 U.S.C. 30233 rules
MPEP § 2281 — Interviews in Ex Parte Reexamination Proceedings48 rules
MPEP § 2282 — Notification of Existence of Prior or Concurrent Proceedings and Decisions Thereon12 rules
MPEP § 2283 — Multiple Copending Ex Parte Reexamination Proceedings62 rules
MPEP § 2284 — Copending Ex Parte Reexamination and Interference Proceedings47 rules
MPEP § 2285 — Copending Ex Parte Reexamination and Reissue Proceedings21 rules
MPEP § 2286 — Ex Parte Reexamination and Litigation Proceedings48 rules
MPEP § 2286.01 — Reexamination and Inter Partes Review Proceedings, Post-Grant Review, and Covered Business Method Patent Review4 rules
MPEP § 2287 — Conclusion of Ex Parte Reexamination Proceeding103 rules
MPEP § 2287.01 — Examiner Consideration of Submissions After a NIRC5 rules
MPEP § 2288 — Issuance of Ex Parte Reexamination Certificate13 rules
MPEP § 2289 — Reexamination Review2 rules
MPEP § 2290 — Format of Ex Parte Reexamination Certificate18 rules
MPEP § 2291 — Notice of Ex Parte Reexamination Certificate Issuance in Official Gazette1 rules
MPEP § 2292 — Distribution of Certificate0 rules
MPEP § 2293 — Intervening Rights2 rules
MPEP § 2294 — Concluded Reexamination Proceedings16 rules
MPEP § 2295 — Reexamination of a Reexamination23 rules
MPEP § 2296 — USPTO Forms To Be Used In Ex Parte Reexamination1 rules