MPEP § 2295 — Reexamination of a Reexamination (Annotated Rules)

§2295 Reexamination of a Reexamination

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 2295, 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.

Reexamination of a Reexamination

This section addresses Reexamination of a Reexamination. Primary authority: 35 U.S.C. 305, 35 U.S.C. 307, and 37 CFR 1.550. Contains: 1 requirement, 5 guidance statements, 1 permission, and 4 other statements.

Key Rules

Topic

Reexamination Certificate

15 rules
StatutoryInformativeAlways
[mpep-2295-e056bdf7a590c2253fcc8dfd]
Second Request Not Merged If First Certificate Issued Soon
Note:
If a second reexamination request is filed and the first certificate will issue within 3 months, the proceedings for the second request will not be merged with the first.

If a second request for reexamination of a patent is filed where the certificate for the first reexamination of the patent will issue within 3 months from the filing of the second request, the proceedings normally will not be merged. If the certificate for the first reexamination proceeding will issue before the decision on the second request must be decided, the reexamination certificate is allowed to issue. The second request is then considered based upon the claims in the patent as indicated in the issued reexamination certificate rather than the original claims of the patent. The Legal Instrument Examiner (LIE) will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationMerged Reexamination Proceedings
StatutoryRequiredAlways
[mpep-2295-42d241db8c1671fc2f11eebc]
First Reexamination Certificate Allowed Before Second Request Decision
Note:
If the first reexamination certificate issues before deciding on a second request, it is allowed to issue and the second request will be based on the claims in the issued certificate.

If a second request for reexamination of a patent is filed where the certificate for the first reexamination of the patent will issue within 3 months from the filing of the second request, the proceedings normally will not be merged. If the certificate for the first reexamination proceeding will issue before the decision on the second request must be decided, the reexamination certificate is allowed to issue. The second request is then considered based upon the claims in the patent as indicated in the issued reexamination certificate rather than the original claims of the patent. The Legal Instrument Examiner (LIE) will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
StatutoryInformativeAlways
[mpep-2295-5fb14d9c746eed9d32e710e7]
Second Request Based on Issued Reexamination Certificate
Note:
The second request for reexamination is considered based on the claims in the issued reexamination certificate rather than the original patent claims.

If a second request for reexamination of a patent is filed where the certificate for the first reexamination of the patent will issue within 3 months from the filing of the second request, the proceedings normally will not be merged. If the certificate for the first reexamination proceeding will issue before the decision on the second request must be decided, the reexamination certificate is allowed to issue. The second request is then considered based upon the claims in the patent as indicated in the issued reexamination certificate rather than the original claims of the patent. The Legal Instrument Examiner (LIE) will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
StatutoryRecommendedAlways
[mpep-2295-4a15a2179046122cd8ba1a2b]
Preliminary Amendment Entered Into Reexamination File
Note:
The determination in the order/denial decision on the second request is based upon new patent claims in the certificate, which was entered into the reexamination file.

In the order/denial decision on the second request, it should be noted that this preliminary amendment (the certificate) was entered into the reexamination file, and that the determination (order/denial) was based upon the new patent claims in the certificate.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationReexamination Order
StatutoryRecommendedAlways
[mpep-2295-6b396aa54ed4de18db8a0586]
Second Reexamination Requester Gets Certificate Copy
Note:
Third party requesters of a second reexamination must receive a copy of the reexamination certificate as part of the order/denial decision.

A copy of the reexamination certificate should be included as an attachment to the order/denial decision to ensure that any third party requester of the second reexamination has a copy of the certificate claims.

Jump to MPEP SourceReexamination CertificateThird Party Requester RightsConclusion of Ex Parte Reexamination
StatutoryInformativeAlways
[mpep-2295-90f4af5c821912f3f252f244]
Bracketed Text Not Considered In Patent
Note:
Any text within brackets in the reexamination certificate is disregarded and not considered part of the original patent.

Any amendment to the claims (or specification) of the reexamination proceeding must be presented as if the changes made to the patent text via the reexamination certificate are a part of the original patent. Thus, all italicized text in the certificate is considered as if the text was present without italics in the original patent. Further, any certificate text placed in brackets is considered as if it were never present in the patent at all.

Jump to MPEP SourceReexamination CertificateReissue Amendment FormatConclusion of Ex Parte Reexamination
StatutoryInformativeAlways
[mpep-2295-e49d9c669ce793f3ba3d7a1c]
Amendment Adding Text Already Present Is Improper
Note:
An amendment that adds text already included in the patent via a reexamination certificate is considered improper and will be treated as an informal submission.

For example, an amendment in a “reexamination of a reexamination” might include italicized text of claim 1 of the reexamination certificate as underlined (or italicized) in the copy of claim 1 submitted in the amendment. This would indicate that text already present in the patent (via the reexamination certificate) is again being added. This would be an improper amendment, and as such, an “informal submission.” Accordingly, the examiner would notify the patent owner that the amendment does not comply with 37 CFR 1.530. Form PTOL-475 or form PTO-2311 would be used to provide the notification of the defect in the amendment, as appropriate, and an appropriate time period (see MPEP § 2266.02) would be set for correction of the defect.

Jump to MPEP Source · 37 CFR 1.530Reexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
StatutoryInformativeAlways
[mpep-2295-5230813cc7775db2cbca1674]
Notification for Improper Amendment
Note:
Examiner will notify patent owner of defect in amendment and set a correction period.

For example, an amendment in a “reexamination of a reexamination” might include italicized text of claim 1 of the reexamination certificate as underlined (or italicized) in the copy of claim 1 submitted in the amendment. This would indicate that text already present in the patent (via the reexamination certificate) is again being added. This would be an improper amendment, and as such, an “informal submission.” Accordingly, the examiner would notify the patent owner that the amendment does not comply with 37 CFR 1.530. Form PTOL-475 or form PTO-2311 would be used to provide the notification of the defect in the amendment, as appropriate, and an appropriate time period (see MPEP § 2266.02) would be set for correction of the defect.

Jump to MPEP Source · 37 CFR 1.530Reexamination CertificateConclusion of Ex Parte ReexaminationPatent Owner Statement
StatutoryInformativeAlways
[mpep-2295-5d2c4c4f7377f65b1dd455bb]
Certificate Must Set Forth Results and Patent Content After Reexamination
Note:
The certificate must include the results of the reexamination proceeding and the updated patent content following the proceeding.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateReissue and ReexaminationConclusion of Ex Parte Reexamination
StatutoryRecommendedAlways
[mpep-2295-305a254cbcff6b1f04ee73d5]
Patent Is Original As Modified By Reexamination Certificate
Note:
Examiners and CRU support staff must consider the original patent as modified by any reexamination certificate when completing checklists.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateReissue and ReexaminationConclusion of Ex Parte Reexamination
StatutoryRecommendedAlways
[mpep-2295-d199210674ca4ce7d9232cf0]
Claims Previously Cancelled Must Be Listed
Note:
Claims canceled by a prior reexamination certificate must be listed in the reexamination certificate's Item 8.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateReissue and ReexaminationConclusion of Ex Parte Reexamination
StatutoryRecommendedAlways
[mpep-2295-f551f90258525962ccf85824]
Claims Amended Only by Prior Certificate Not Listed
Note:
Claims amended solely by the prior reexamination certificate, without further amendment in the current process, should not be included in Item 12 of the examiner checklist.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Reexamination CertificateReissue and ReexaminationConclusion of Ex Parte Reexamination
MPEP GuidanceInformativeAlways
[mpep-2295-f02597091cb87d80b77f150e]
Claims Must Reflect Reexamination Certificate
Note:
The claims in the patent must be based on those modified by the previously issued reexamination certificate, not the original claims.

The reexamination request is to be considered based on the claims in the patent as modified by the previously issued reexamination certificate, and not based on the original claims of the patent. Accordingly, when the file for the new reexamination proceeding (reexamination of a reexamination) is first received by the Central Reexamination Unit (CRU), the CRU technical support staff will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment. Such incorporation must be done prior to forwarding the proceeding to the examiner for action.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
MPEP GuidanceRecommendedAlways
[mpep-2295-b11512b5550830e2e1b5e6eb]
Certificate Changes Must Be Accurate
Note:
Ensure all certificate changes are properly entered to maintain accurate specification and claims for reexamination and correct patent version in future certificates.

The examiner should review the CRU support staff's entry of the reexamination certificate to ensure that all certificate changes are properly entered so that (A) the reexamination will be given on an accurate specification and claims, and (B) the appropriate version of the patent will be printed in any future reexamination certificate that will ultimately issue. The examiner will issue a decision on the reexamination request based on the patent claims (and specification) with the certificate changes entered.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationCentral Reexamination Unit Processing
MPEP GuidanceInformativeAlways
[mpep-2295-e877e61d56cb25faddac7749]
Examiner Must Review Certificate Changes for Reexamination
Note:
The examiner is required to verify that all certificate changes are correctly entered before issuing a decision on the reexamination request based on the updated patent claims and specification.

The examiner should review the CRU support staff's entry of the reexamination certificate to ensure that all certificate changes are properly entered so that (A) the reexamination will be given on an accurate specification and claims, and (B) the appropriate version of the patent will be printed in any future reexamination certificate that will ultimately issue. The examiner will issue a decision on the reexamination request based on the patent claims (and specification) with the certificate changes entered.

Jump to MPEP SourceReexamination CertificateConclusion of Ex Parte ReexaminationEx Parte Reexamination
Topic

Access to Prosecution History

2 rules
StatutoryInformativeAlways
[mpep-2295-685a5d19b7d3a4d68d70c79a]
Second Reexamination Based on Issued Certificate
Note:
The Legal Instrument Examiner prints out and records a copy of the issued reexamination certificate as a preliminary amendment in the second reexamination file wrapper.

If a second request for reexamination of a patent is filed where the certificate for the first reexamination of the patent will issue within 3 months from the filing of the second request, the proceedings normally will not be merged. If the certificate for the first reexamination proceeding will issue before the decision on the second request must be decided, the reexamination certificate is allowed to issue. The second request is then considered based upon the claims in the patent as indicated in the issued reexamination certificate rather than the original claims of the patent. The Legal Instrument Examiner (LIE) will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment.

Jump to MPEP SourceAccess to Prosecution HistoryReexamination CertificateAccess to Specific Document Types
MPEP GuidanceRequiredAlways
[mpep-2295-f3504382c09e32f944d77605]
Reexamination Certificate Must Be Recorded
Note:
When a new reexamination proceeding is received, the CRU technical support staff must print and record the issued reexamination certificate as a preliminary amendment before forwarding it to the examiner.

The reexamination request is to be considered based on the claims in the patent as modified by the previously issued reexamination certificate, and not based on the original claims of the patent. Accordingly, when the file for the new reexamination proceeding (reexamination of a reexamination) is first received by the Central Reexamination Unit (CRU), the CRU technical support staff will print out a copy of the issued reexamination certificate and make it of record in the second reexamination file wrapper as a preliminary amendment. Such incorporation must be done prior to forwarding the proceeding to the examiner for action.

Jump to MPEP SourceAccess to Prosecution HistoryReexamination CertificateAccess to Specific Document Types
Topic

Reexamination Order

1 rules
StatutoryInformativeAlways
[mpep-2295-9fcbee113159311677ce3395]
Reexamination Proceeding Conducted According to Statutes and Regulations
Note:
The reexamination proceeding must follow the procedures outlined in 35 U.S.C. 305, 37 CFR 1.550, and MPEP sections 2254-2294 once an order for reexamination is issued.

Once reexamination is ordered, the reexamination proceeding is conducted in accordance with 35 U.S.C. 305, 37 CFR 1.550 and MPEP §§ 2254 – 2294.

Jump to MPEP Source · 37 CFR 1.550Reexamination OrderEx Parte Reexamination
Topic

Changes Relative to Patent

1 rules
StatutoryRequiredAlways
[mpep-2295-f7fe2da7a6d17578aa248013]
Amendments Must Reflect Original Patent Text
Note:
All changes made via reexamination certificate must be treated as part of the original patent, including italicized text considered as non-italic in the original.

Any amendment to the claims (or specification) of the reexamination proceeding must be presented as if the changes made to the patent text via the reexamination certificate are a part of the original patent. Thus, all italicized text in the certificate is considered as if the text was present without italics in the original patent. Further, any certificate text placed in brackets is considered as if it were never present in the patent at all.

Jump to MPEP SourceChanges Relative to PatentReexamination CertificateReissue and Reexamination
Topic

Patent Owner Statement

1 rules
StatutoryInformativeAlways
[mpep-2295-cd3048191458f331ed6df979]
Examiner Notifies Patent Owner of Non-Compliant Amendment
Note:
The examiner informs the patent owner that an amendment does not meet the requirements specified in 37 CFR 1.530.

For example, an amendment in a “reexamination of a reexamination” might include italicized text of claim 1 of the reexamination certificate as underlined (or italicized) in the copy of claim 1 submitted in the amendment. This would indicate that text already present in the patent (via the reexamination certificate) is again being added. This would be an improper amendment, and as such, an “informal submission.” Accordingly, the examiner would notify the patent owner that the amendment does not comply with 37 CFR 1.530. Form PTOL-475 or form PTO-2311 would be used to provide the notification of the defect in the amendment, as appropriate, and an appropriate time period (see MPEP § 2266.02) would be set for correction of the defect.

Jump to MPEP Source · 37 CFR 1.530Patent Owner StatementEx Parte ReexaminationReexamination Certificate
Topic

Notice of Intent to Issue Reexamination Certificate (NIRC)

1 rules
StatutoryPermittedAlways
[mpep-2295-b466585727903369cacc1e7a]
Reexamination Certificate Preparation After NIRC
Note:
The CRU or TC processes the reexamination file after mailing the NIRC so that the Office of Data Management can prepare and issue a certificate according to 35 U.S.C. 307 and 37 CFR 1.570.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Notice of Intent to Issue Reexamination Certificate (NIRC)Reexamination CertificateReissue and Reexamination
Topic

Reissue and Reexamination

1 rules
StatutoryInformativeAlways
[mpep-2295-f0315b45336988c0d3ea132d]
Examiner and CRU Support Staff Must Complete Checklists for Reexamination
Note:
The examiner must complete Form PTO-1516 and the CRU support staff must complete Form PTO-1517 to document the results of the reexamination proceeding.

After the mailing of the NIRC, the reexamination file will be processed by the CRU or the TC so that the Office of Data Management can prepare and issue a certificate in accordance with 35 U.S.C. 307 and 37 CFR 1.570. The certificate will set forth the results of the reexamination proceeding and the content of the patent following the proceeding. See MPEP § 2287. The examiner will complete a checklist, Form PTO-1516, and the CRU support staff will complete the reexamination clerk checklist Form PTO-1517. In completing the checklists, the examiner and CRU support staff should keep in mind that the “patent” is the original patent as modified by the reexamination certificate. For example, claims canceled by the prior reexamination certificate should be listed in Item 8 – “Claim(s) __________ was (were) previously canceled.” Likewise, in Item 12 of the examiner checklist – “Claim(s) ________ is (are) determined to be patentable as amended”; any claims amended only by the prior reexamination certificate (i.e., not further amended in the present reexamination) should not be listed.

Jump to MPEP Source · 37 CFR 1.570Reissue and ReexaminationCentral Reexamination Unit ProcessingConcurrent Reissue Proceedings
Topic

Quality Assurance Specialist Review

1 rules
StatutoryRequiredAlways
[mpep-2295-b893ca7b4e3d3904bcf1a1c4]
QAS and Paralegal Review Required for Reexamination of a Reexamination
Note:
Each reexamination of a reexamination must be reviewed by a QAS, SPRS, or paralegal to ensure compliance with the guidelines.

Each “reexamination of a reexamination” must be reviewed by a CRU Supervisory Patent Reexamination Specialist (SPRS) or TC Quality Assurance Specialist (QAS) and a paralegal to ensure compliance with the above guidelines.

Jump to MPEP SourceQuality Assurance Specialist ReviewCentral Reexamination Unit ProcessingAllowance Quality Review

Citations

Primary topicCitation
Reexamination Order35 U.S.C. § 305
Notice of Intent to Issue Reexamination Certificate (NIRC)
Reexamination Certificate
Reissue and Reexamination
35 U.S.C. § 307
Patent Owner Statement
Reexamination Certificate
37 CFR § 1.530
Reexamination Order37 CFR § 1.550
Notice of Intent to Issue Reexamination Certificate (NIRC)
Reexamination Certificate
Reissue and Reexamination
37 CFR § 1.570
Reexamination OrderMPEP § 2254
Patent Owner Statement
Reexamination Certificate
MPEP § 2266.02
Notice of Intent to Issue Reexamination Certificate (NIRC)
Reexamination Certificate
Reissue and Reexamination
MPEP § 2287

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31