MPEP § 2264 — Mailing of Office Action (Annotated Rules)

§2264 Mailing of Office Action

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

This page consolidates and annotates all enforceable requirements under MPEP § 2264, 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.

Mailing of Office Action

This section addresses Mailing of Office Action. Primary authority: 37 CFR 1.33(a). Contains: 1 requirement, 5 permissions, and 3 other statements.

Key Rules

Topic

Correspondence Address Requirements

6 rules
StatutoryPermittedAlways
[mpep-2264-91d1241ebf05b2de13033f68]
Reexamination Forms Must Include Identifying Information and Correspondence Address
Note:
Ex parte reexamination forms must include the identifying information for the reexamination file and the official correspondence address of record for the patent owner.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryInformativeAlways
[mpep-2264-bd41f7d39994adec127af4fc]
Patent Owner's Legal Representative Mailing Address Required
Note:
The official correspondence address of the patent owner, typically the mailing address of their legal representative, must be provided for ex parte reexamination forms.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2264-95f65f34fdf85c6c408be1c1]
Mailing Address as Correspondence When No Official Address
Note:
If no official correspondence address is recorded, the Office may use the patent owner's mailing address for communication.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2264-0aa65c73a0cbec71ac5b0962]
Mailing Address for First Named Owner
Note:
The Office may treat the mailing address of the first named patent owner as the correspondence address when there are multiple owners.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryInformativeAlways
[mpep-2264-5c5921db03ecad1e85591979]
No Double Correspondence with Multiple Owners
Note:
The Office will not send correspondence to more than one patent owner for a single patent.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
StatutoryPermittedAlways
[mpep-2264-6198add905569c1c8e15bf13]
Copies of Office Actions Available Online
Note:
Patent examiners can provide copies of office actions to applicants by directing them to access Patent Center on the USPTO website.

Ex parte reexamination forms are structured so that the identifying information for the reexamination file and the correspondence address for the patent owner, which is the official correspondence address of record in the file of the patent requested to be reexamined, can be printed on the forms. Usually, the official correspondence address of the patent owner, which is of record in the file of the patent, is the mailing address of the patent owner's legal representative. If there is no official correspondence address of record in the patent file, the Office may treat the mailing address of the patent owner as the correspondence address. Where there are multiple patent owners, the Office may treat the mailing address of the first named patent owner of record as the correspondence address of the patent owner. The Office will not engage in double correspondence with more than one patent owner. See 37 CFR 1.33(a). Copies of Office actions may be obtained by accessing Patent Center at the Office's website www.uspto.gov.

Jump to MPEP Source · 37 CFR 1.33(a)Correspondence Address RequirementsCorrespondence with the OfficeCorrespondence Address
Topic

Interviews in Reexamination

3 rules
StatutoryInformativeAlways
[mpep-2264-e83b1ab4aae36cc3b3d99bfd]
Mailing Requirement for Third Party Requesters in Ex Parte Reexamination
Note:
All Office actions in an ex parte reexamination must be mailed to the third party requester using a specific form, unless otherwise specified.

All actions in a third party requester ex parte reexamination will have a copy mailed to the third party requester. A transmittal form PTOL-465 must be used in providing the third party requester with a copy of each Office action. If there are more than one third party requester for a single request, and if a third party requester has not designated the mailing address of a registered patent practitioner as the correspondence address for the requester, the Office may treat the mailing address of the first named third party requester as the correspondence address for the third party requester.

Jump to MPEP SourceInterviews in ReexaminationThird Party Requester RightsInter Partes Reexamination Request
StatutoryRequiredAlways
[mpep-2264-72c17d7973014b60b4d73276]
Transmittal Form PTOL-465 Required for Third Party Requester Office Actions
Note:
A transmittal form PTOL-465 must be used to provide each Office action to a third party requester in an ex parte reexamination.

All actions in a third party requester ex parte reexamination will have a copy mailed to the third party requester. A transmittal form PTOL-465 must be used in providing the third party requester with a copy of each Office action. If there are more than one third party requester for a single request, and if a third party requester has not designated the mailing address of a registered patent practitioner as the correspondence address for the requester, the Office may treat the mailing address of the first named third party requester as the correspondence address for the third party requester.

Jump to MPEP SourceInterviews in ReexaminationOffice Actions in ReexaminationThird Party Requester Rights
StatutoryPermittedAlways
[mpep-2264-d840639cdc89891debb41c78]
Mailing Address for Third Party Requester
Note:
The Office may use the first named third party requester's mailing address if no registered patent practitioner has been designated as the correspondence address.

All actions in a third party requester ex parte reexamination will have a copy mailed to the third party requester. A transmittal form PTOL-465 must be used in providing the third party requester with a copy of each Office action. If there are more than one third party requester for a single request, and if a third party requester has not designated the mailing address of a registered patent practitioner as the correspondence address for the requester, the Office may treat the mailing address of the first named third party requester as the correspondence address for the third party requester.

Jump to MPEP SourceInterviews in ReexaminationThird Party Requester RightsCorrespondence Address Requirements

Citations

Primary topicCitation
Correspondence Address Requirements37 CFR § 1.33(a)

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