MPEP § 2237 — Transfer Procedure (Annotated Rules)

§2237 Transfer Procedure

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

This page consolidates and annotates all enforceable requirements under MPEP § 2237, 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.

Transfer Procedure

This section addresses Transfer Procedure. Primary authority: 35 U.S.C. 305. Contains: 2 requirements, 1 prohibition, 1 guidance statement, and 1 other statement.

Key Rules

Topic

Central Reexamination Unit Processing

4 rules
StatutoryInformativeAlways
[mpep-2237-ee18b1f5f3faa7eb7c3a916e]
Reexamination Must Be Assigned to Relevant Art Unit
Note:
A reexamination request must be assigned to an art unit that specializes in the technology of the patent being reexamined, and any transfer requires consent from both art units involved.

A reexamination request is normally assigned to a Central Reexamination Unit (CRU) art unit which examines the technology (Chemical, Electrical, Mechanical, etc.) in which the patent to be reexamined is currently classified as an original. If the CRU Supervisory Patent Reexamination Specialist (SPRS) (to whose art unit the reexamination has been assigned) believes that the reexamination should be assigned to another art unit, he or she must obtain the consent of the CRU SPRS of the art unit to which a transfer is desired. Pursuant to 35 U.S.C. 305, all ex parte reexamination proceedings must be conducted with special dispatch within the Office. This applies to the transfer of reexamination proceedings. Accordingly, the CRU SPRS to whose art unit the reexamination has been assigned should expeditiously make any request for transfer of a reexamination proceeding to the CRU SPRS of the art unit to which a transfer is desired (the “new” art unit). Any conflict which cannot be resolved by the SPRSs will be resolved by the CRU Director.

Jump to MPEP SourceCentral Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
StatutoryRequiredAlways
[mpep-2237-5fa7a024231f574ce30c17f1]
Reexamination Art Unit Transfer Requires Consent
Note:
A CRU SPRS must obtain consent from the new art unit's SPRS before transferring a reexamination to another art unit.

A reexamination request is normally assigned to a Central Reexamination Unit (CRU) art unit which examines the technology (Chemical, Electrical, Mechanical, etc.) in which the patent to be reexamined is currently classified as an original. If the CRU Supervisory Patent Reexamination Specialist (SPRS) (to whose art unit the reexamination has been assigned) believes that the reexamination should be assigned to another art unit, he or she must obtain the consent of the CRU SPRS of the art unit to which a transfer is desired. Pursuant to 35 U.S.C. 305, all ex parte reexamination proceedings must be conducted with special dispatch within the Office. This applies to the transfer of reexamination proceedings. Accordingly, the CRU SPRS to whose art unit the reexamination has been assigned should expeditiously make any request for transfer of a reexamination proceeding to the CRU SPRS of the art unit to which a transfer is desired (the “new” art unit). Any conflict which cannot be resolved by the SPRSs will be resolved by the CRU Director.

Jump to MPEP SourceCentral Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
StatutoryRecommendedAlways
[mpep-2237-5958fb471d3f40a237792b7b]
CRU SPRS Must Expedite Transfer Request
Note:
The CRU SPRS to whose art unit a reexamination has been assigned must promptly request transfer of the proceeding to the desired new art unit.

A reexamination request is normally assigned to a Central Reexamination Unit (CRU) art unit which examines the technology (Chemical, Electrical, Mechanical, etc.) in which the patent to be reexamined is currently classified as an original. If the CRU Supervisory Patent Reexamination Specialist (SPRS) (to whose art unit the reexamination has been assigned) believes that the reexamination should be assigned to another art unit, he or she must obtain the consent of the CRU SPRS of the art unit to which a transfer is desired. Pursuant to 35 U.S.C. 305, all ex parte reexamination proceedings must be conducted with special dispatch within the Office. This applies to the transfer of reexamination proceedings. Accordingly, the CRU SPRS to whose art unit the reexamination has been assigned should expeditiously make any request for transfer of a reexamination proceeding to the CRU SPRS of the art unit to which a transfer is desired (the “new” art unit). Any conflict which cannot be resolved by the SPRSs will be resolved by the CRU Director.

Jump to MPEP SourceCentral Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
StatutoryProhibitedAlways
[mpep-2237-d77ecf2cd567e626bce2f660]
CRU Director Resolves Unresolved Conflicts
Note:
When SPRSs cannot resolve a conflict, the CRU Director must make the final decision.

A reexamination request is normally assigned to a Central Reexamination Unit (CRU) art unit which examines the technology (Chemical, Electrical, Mechanical, etc.) in which the patent to be reexamined is currently classified as an original. If the CRU Supervisory Patent Reexamination Specialist (SPRS) (to whose art unit the reexamination has been assigned) believes that the reexamination should be assigned to another art unit, he or she must obtain the consent of the CRU SPRS of the art unit to which a transfer is desired. Pursuant to 35 U.S.C. 305, all ex parte reexamination proceedings must be conducted with special dispatch within the Office. This applies to the transfer of reexamination proceedings. Accordingly, the CRU SPRS to whose art unit the reexamination has been assigned should expeditiously make any request for transfer of a reexamination proceeding to the CRU SPRS of the art unit to which a transfer is desired (the “new” art unit). Any conflict which cannot be resolved by the SPRSs will be resolved by the CRU Director.

Jump to MPEP SourceCentral Reexamination Unit ProcessingEx Parte ReexaminationEx Parte Reexamination Request
Topic

Ex Parte Reexamination

1 rules
StatutoryRequiredAlways
[mpep-2237-dc7605a0df3626598ee14498]
Ex Parte Reexamination Must Be Conducted with Special Dispatch
Note:
All ex parte reexamination proceedings must be expedited within the Office, including transfers between art units.

A reexamination request is normally assigned to a Central Reexamination Unit (CRU) art unit which examines the technology (Chemical, Electrical, Mechanical, etc.) in which the patent to be reexamined is currently classified as an original. If the CRU Supervisory Patent Reexamination Specialist (SPRS) (to whose art unit the reexamination has been assigned) believes that the reexamination should be assigned to another art unit, he or she must obtain the consent of the CRU SPRS of the art unit to which a transfer is desired. Pursuant to 35 U.S.C. 305, all ex parte reexamination proceedings must be conducted with special dispatch within the Office. This applies to the transfer of reexamination proceedings. Accordingly, the CRU SPRS to whose art unit the reexamination has been assigned should expeditiously make any request for transfer of a reexamination proceeding to the CRU SPRS of the art unit to which a transfer is desired (the “new” art unit). Any conflict which cannot be resolved by the SPRSs will be resolved by the CRU Director.

Jump to MPEP SourceEx Parte ReexaminationCentral Reexamination Unit ProcessingEx Parte Reexamination Request

Citations

Primary topicCitation
Central Reexamination Unit Processing
Ex Parte Reexamination
35 U.S.C. § 305

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