MPEP § 2248 — Petition From Denial of Request Filed Under 35 U.S.C. 302 (Annotated Rules)

§2248 Petition From Denial of Request Filed Under 35 U.S.C. 302

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

This page consolidates and annotates all enforceable requirements under MPEP § 2248, 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.

Petition From Denial of Request Filed Under 35 U.S.C. 302

This section addresses Petition From Denial of Request Filed Under 35 U.S.C. 302. Primary authority: 35 U.S.C. 302, 35 U.S.C. 2294, and 35 U.S.C. 303(c). Contains: 1 requirement, 1 guidance statement, 3 permissions, and 9 other statements.

Key Rules

Topic

Central Reexamination Unit Processing

5 rules
StatutoryInformativeAlways
[mpep-2248-79b8e85c61cc2001cf074632]
Petition for Review of Examiner’s Determination Refusing Reexamination
Note:
The Central Reexamination Unit allows time to petition for review if a request for ex parte reexamination under 35 U.S.C. 302 is denied, but the petition must be filed within one month.

After a request for reexamination under 35 U.S.C. 302 has been denied, the Central Reexamination Unit (CRU) will allow time for a petition seeking review of the examiner’s determination refusing reexamination. If a petition seeking review of the examiner’s determination refusing reexamination is not filed within one (1) month of the examiner’s determination, the CRU will then process the reexamination file as a concluded reexamination file. See MPEP § 2247 and § 2294.

Jump to MPEP Source · 37 CFR 1.515Central Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
StatutoryInformativeAlways
[mpep-2248-d61adbc50399316c3bd30506]
Petition Seeking Review Must Be Filed Within One Month
Note:
A petition seeking review of an examiner’s determination refusing reexamination must be filed within one month; otherwise, the CRU will process the file as concluded.

After a request for reexamination under 35 U.S.C. 302 has been denied, the Central Reexamination Unit (CRU) will allow time for a petition seeking review of the examiner’s determination refusing reexamination. If a petition seeking review of the examiner’s determination refusing reexamination is not filed within one (1) month of the examiner’s determination, the CRU will then process the reexamination file as a concluded reexamination file. See MPEP § 2247 and § 2294.

Jump to MPEP Source · 37 CFR 1.515Central Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
StatutoryRecommendedAlways
[mpep-2248-3c8e68d20c2c187a4c52e557]
Two-Month Period for Reexamination Assignment
Note:
If the petition is granted, a two-month period must be set for filing a statement under 37 CFR 1.530; then the reexamination file will be returned to the appropriate art unit for potential examiner reassessment.

If the petition is granted, the decision of the CRU Director should include a sentence setting a two-month period for filing a statement under 37 CFR 1.530; the reexamination file will then be returned to the CRU Supervisory Patent Reexamination Specialist (SPRS) of the art unit that will handle the reexamination for consideration of reassignment to another examiner.

Jump to MPEP Source · 37 CFR 1.530Central Reexamination Unit ProcessingPatent Owner StatementEx Parte Reexamination
StatutoryPermittedAlways
[mpep-2248-a2fe6b0b99aeb88e068770bf]
Exception for Reexamining Patent Examiners
Note:
Only unusual circumstances allow the CRU Director to reassign a reexamination proceeding to an examiner involved with the original patent examination.

Under normal circumstances, the reexamination proceeding will not be reassigned to a primary examiner or assistant examiner who was involved in any part of the examination of the patent for which reexamination is requested. Only where unusual circumstances are found to exist may the CRU Director make an exception to this practice and reassign the reexamination proceeding to an examiner involved with the examination of the patent. For example, if the original examiner of the patent and the examiner who issued the denial are the only examiners with adequate knowledge of the relevant technology, the CRU Director may permit reassignment of the reexamination proceeding to the examiner that originally examined the patent.

Jump to MPEP Source · 37 CFR 1.515Central Reexamination Unit ProcessingStatutory Authority for ExaminationEx Parte Reexamination
StatutoryPermittedAlways
[mpep-2248-472484ee2e754e96df280186]
Reexamination Proceeding Can Be Reassigned to Original Examiner
Note:
The CRU Director may permit reassignment of the reexamination proceeding to the original examiner if they are the only ones with adequate knowledge of the relevant technology.

Under normal circumstances, the reexamination proceeding will not be reassigned to a primary examiner or assistant examiner who was involved in any part of the examination of the patent for which reexamination is requested. Only where unusual circumstances are found to exist may the CRU Director make an exception to this practice and reassign the reexamination proceeding to an examiner involved with the examination of the patent. For example, if the original examiner of the patent and the examiner who issued the denial are the only examiners with adequate knowledge of the relevant technology, the CRU Director may permit reassignment of the reexamination proceeding to the examiner that originally examined the patent.

Jump to MPEP Source · 37 CFR 1.515Central Reexamination Unit ProcessingEx Parte ReexaminationStatutory Authority for Examination
Topic

Ex Parte Reexamination

5 rules
StatutoryInformativeAlways
[mpep-2248-3dc0af79c4085d094fd2d572]
Final Decision on Ex Parte Reexamination
Note:
The decision regarding the ex parte reexamination is final and no further communication will be acknowledged or considered.

This decision is final and nonappealable. See 35 U.S.C. 303(c) and 37 CFR 1.515(c). No further communication on this matter will be acknowledged or considered.

Jump to MPEP Source · 37 CFR 1.515(c)Ex Parte ReexaminationSNQ CriteriaSubstantial New Question of Patentability
StatutoryInformativeAlways
[mpep-2248-4e8ae14b46a6975371104fa1]
Challenge to Refusal of Reexamination Only
Note:
This rule permits challenging a refusal to reexamine but not the granting of reexamination.

37 CFR 1.515(c) applies only to challenging a basis for refusing reexamination; it does not apply to challenging a basis for granting of reexamination. Even if an order grants reexamination, a petition under 37 CFR 1.515(c) may be filed to challenge any refusal to reexamine a requested claim or a claim based on a requested basis, if applicable, as described below.

Jump to MPEP Source · 37 CFR 1.515(c)Ex Parte ReexaminationReexamination OrderPetition Procedures (MPEP 1002)
StatutoryInformativeAlways
[mpep-2248-c0fd7c789f48b3e1342523f0]
Petition Decision Is Final and Non-appealable
Note:
A decision on a petition for review of a reexamination request determination is final and cannot be appealed if no timely petition is filed.

Similarly, a petition under 37 CFR 1.181 may be filed (within one month of the mailing date of the order) requesting review of a determination granting a request for reexamination, if the determination grants the request as to a specific claim for some reasons (SNQs) advanced in the request but does not grant the request as to the claim for other reasons (SNQs) advanced in the request. A decision on such a petition is final and non-appealable. If no petition is timely filed, the determination shall be final and non-appealable. See, e.g., Belkin Int'l, Inc. v. Kappos, 696 F.3d 1379, 104 USPQ2d 1348 (Fed. Cir. 2012).

Jump to MPEP Source · 37 CFR 1.181Ex Parte ReexaminationRequest Content RequirementsReexamination Order
StatutoryRequiredAlways
[mpep-2248-d382abef9fbe562be3a07216]
No Timely Petition Makes Determination Final and Non-Appealable
Note:
If no petition is filed within the required time, the determination becomes final and cannot be appealed.

Similarly, a petition under 37 CFR 1.181 may be filed (within one month of the mailing date of the order) requesting review of a determination granting a request for reexamination, if the determination grants the request as to a specific claim for some reasons (SNQs) advanced in the request but does not grant the request as to the claim for other reasons (SNQs) advanced in the request. A decision on such a petition is final and non-appealable. If no petition is timely filed, the determination shall be final and non-appealable. See, e.g., Belkin Int'l, Inc. v. Kappos, 696 F.3d 1379, 104 USPQ2d 1348 (Fed. Cir. 2012).

Jump to MPEP Source · 37 CFR 1.181Ex Parte ReexaminationRequest Content RequirementsReexamination Order
StatutoryInformativeAlways
[mpep-2248-94833577695d082271213883]
Petition for Review of Reexamination Determination
Note:
A petition may be filed within one month of the mailing date to review a reexamination determination that grants or denies a request based on specific reasons.

Similarly, a petition under 37 CFR 1.181 may be filed (within one month of the mailing date of the order) requesting review of a determination granting a request for reexamination, if the determination grants the request as to a specific claim for some reasons (SNQs) advanced in the request but does not grant the request as to the claim for other reasons (SNQs) advanced in the request. A decision on such a petition is final and non-appealable. If no petition is timely filed, the determination shall be final and non-appealable. See, e.g., Belkin Int'l, Inc. v. Kappos, 696 F.3d 1379, 104 USPQ2d 1348 (Fed. Cir. 2012).

Jump to MPEP Source · 37 CFR 1.181Ex Parte ReexaminationRequest Content RequirementsReexamination Order
Topic

SNQ Criteria

3 rules
StatutoryInformativeAlways
[mpep-2248-19c642a5317a8766b2b93730]
Final and Nonappealable Decision on Ex Parte Reexamination
Note:
This decision, based on the denial of a request for ex parte reexamination under SNQ criteria, is final and cannot be appealed.

This decision is final and nonappealable. See 35 U.S.C. 303(c) and 37 CFR 1.515(c). No further communication on this matter will be acknowledged or considered.

Jump to MPEP Source · 37 CFR 1.515(c)SNQ CriteriaSubstantial New Question of PatentabilityEx Parte Reexamination
StatutoryInformativeAlways
[mpep-2248-c150e63c177fd4bf2032ebe4]
Decision on Petition Under 37 CFR 1.515(c) Is Final and Not Appealable
Note:
The decision on a petition under 37 CFR 1.515(c) is final and cannot be appealed.

After the time for petition has expired without a petition having been filed, or a petition has been filed and the decision thereon affirms the denial of the request, a partial refund of the filing fee for requesting reexamination will be made to the requester. (35 U.S.C. 303(c) and 37 CFR 1.26(c)). A decision on a petition under 37 CFR 1.515(c) is final and is not appealable.

Jump to MPEP Source · 37 CFR 1.26(c))SNQ CriteriaEx Parte ReexaminationDenial – No SNQ Raised
StatutoryPermittedAlways
[mpep-2248-ad337c0cb47c24c2ad6fe984]
Third Party Can Reconsider Non-SHQ Claim
Note:
A third party requester may petition for reconsideration of a claim not raising a substantial new question of patentability within one month of the reexamination order.

If an order granting reexamination includes a determination that the third party requester has not raised a substantial new question of patentability (SNQ) for one claim, but has raised a SNQ for at least one other claim, then third party requester may (within one month of the mailing date of the order) file a petition under 37 CFR 1.515(c) for reconsideration of the determination as to the claim for which no SNQ has been found to be raised.

Jump to MPEP Source · 37 CFR 1.515(c)SNQ CriteriaGrounds for ReexaminationThird Party Requester Rights
Topic

Statutory Authority for Examination

1 rules
StatutoryInformativeAlways
[mpep-2248-d0e231a3395eb8a6a62e8458]
Examiner Not Involved in Original Exam May Handle Reexamination
Note:
An examiner who did not participate in the original examination of a patent cannot handle its reexamination unless unusual circumstances are present and approved by the CRU Director.

Under normal circumstances, the reexamination proceeding will not be reassigned to a primary examiner or assistant examiner who was involved in any part of the examination of the patent for which reexamination is requested. Only where unusual circumstances are found to exist may the CRU Director make an exception to this practice and reassign the reexamination proceeding to an examiner involved with the examination of the patent. For example, if the original examiner of the patent and the examiner who issued the denial are the only examiners with adequate knowledge of the relevant technology, the CRU Director may permit reassignment of the reexamination proceeding to the examiner that originally examined the patent.

Jump to MPEP Source · 37 CFR 1.515Statutory Authority for ExaminationEx Parte ReexaminationExamination Procedures
Topic

Third Party Requester

1 rules
StatutoryPermittedAlways
[mpep-2248-fa19e50c380ff98a6f1e804c]
Requester Must Petition Director Within One Month
Note:
A requester must petition the USPTO Director for review of a denied reexamination request within one month of the denial mailing date. Extensions can be sought by filing a separate petition with the appropriate fee.

The requester may seek review of a denial of a request for reexamination only by petitioning the Director of the USPTO under 37 CFR 1.515(c) and 1.181 within one month of the mailing date of the decision denying the request for reexamination. Additionally, any request for an extension of the time period to file such a petition from the examiner’s denial of a request for reexamination can only be entertained by filing a petition under 37 CFR 1.183 with appropriate fee to waive the time provisions of 37 CFR 1.515(c).

Jump to MPEP Source · 37 CFR 1.515(c)Third Party RequesterReexamination Filing FeeEx Parte Reexamination Request
Topic

Denial – No SNQ Raised

1 rules
StatutoryInformativeAlways
[mpep-2248-1d0056b104bb7e77a19d346f]
Partial Refund of Filing Fee After Denial
Note:
A partial refund of the filing fee is provided if a reexamination request is denied after the petition period or affirmed in decision.

After the time for petition has expired without a petition having been filed, or a petition has been filed and the decision thereon affirms the denial of the request, a partial refund of the filing fee for requesting reexamination will be made to the requester. (35 U.S.C. 303(c) and 37 CFR 1.26(c)). A decision on a petition under 37 CFR 1.515(c) is final and is not appealable.

Jump to MPEP Source · 37 CFR 1.26(c))Denial – No SNQ RaisedFiling, Search & Examination FeesIntervening Rights After Reinstatement
Topic

Substantial New Question of Patentability

1 rules
StatutoryInformativeAlways
[mpep-2248-19a1126c7c14895f93b5b726]
Refund for Requested Reexamination
Note:
A partial refund of the filing fee is provided if a reexamination request is denied after the petition period or affirmed by decision.

After the time for petition has expired without a petition having been filed, or a petition has been filed and the decision thereon affirms the denial of the request, a partial refund of the filing fee for requesting reexamination will be made to the requester. (35 U.S.C. 303(c) and 37 CFR 1.26(c)). A decision on a petition under 37 CFR 1.515(c) is final and is not appealable.

Jump to MPEP Source · 37 CFR 1.26(c))Substantial New Question of PatentabilityEx Parte ReexaminationSNQ Criteria
Topic

Reexamination Order

1 rules
StatutoryPermittedAlways
[mpep-2248-be7068c6824eb232f6a6bcca]
Petition to Challenge Refusal of Reexamination
Note:
Allows filing a petition under 37 CFR 1.515(c) to challenge any refusal to reexamine a requested claim or basis, even if an order grants reexamination.

37 CFR 1.515(c) applies only to challenging a basis for refusing reexamination; it does not apply to challenging a basis for granting of reexamination. Even if an order grants reexamination, a petition under 37 CFR 1.515(c) may be filed to challenge any refusal to reexamine a requested claim or a claim based on a requested basis, if applicable, as described below.

Jump to MPEP Source · 37 CFR 1.515(c)Reexamination OrderEx Parte ReexaminationPetition Procedures (MPEP 1002)
Topic

Request Content Requirements

1 rules
StatutoryPermittedAlways
[mpep-2248-1f73c3ffa75596a1a1eb20be]
Petition for Review of Partial Reexamination Grant
Note:
A petition under 37 CFR 1.181 may be filed within one month of the mailing date if a request for reexamination is granted for some claims but not others.

Similarly, a petition under 37 CFR 1.181 may be filed (within one month of the mailing date of the order) requesting review of a determination granting a request for reexamination, if the determination grants the request as to a specific claim for some reasons (SNQs) advanced in the request but does not grant the request as to the claim for other reasons (SNQs) advanced in the request. A decision on such a petition is final and non-appealable. If no petition is timely filed, the determination shall be final and non-appealable. See, e.g., Belkin Int'l, Inc. v. Kappos, 696 F.3d 1379, 104 USPQ2d 1348 (Fed. Cir. 2012).

Jump to MPEP Source · 37 CFR 1.181Request Content RequirementsReexamination OrderEx Parte Reexamination Request

Citations

Primary topicCitation
Central Reexamination Unit Processing35 U.S.C. § 2294
Central Reexamination Unit Processing35 U.S.C. § 302
Denial – No SNQ Raised
Ex Parte Reexamination
SNQ Criteria
Substantial New Question of Patentability
35 U.S.C. § 303(c)
Ex Parte Reexamination
Request Content Requirements
37 CFR § 1.181
Third Party Requester37 CFR § 1.183
Denial – No SNQ Raised
SNQ Criteria
Substantial New Question of Patentability
37 CFR § 1.26(c)
Denial – No SNQ Raised
Ex Parte Reexamination
Reexamination Order
SNQ Criteria
Substantial New Question of Patentability
Third Party Requester
37 CFR § 1.515(c)
Central Reexamination Unit Processing37 CFR § 1.530
Central Reexamination Unit ProcessingMPEP § 2247
Ex Parte Reexamination
Request Content Requirements
Belkin Int'l, Inc. v. Kappos, 696 F.3d 1379, 104 USPQ2d 1348 (Fed. Cir. 2012)

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