###### Editorial Note on Part 1

#### Editorial Notes:

1. In Patent and Trademark Office publications and usage the part number is omitted from the numbers of §§ 1.1 to 1.352 and the numbers to the right of the decimal point correspond with the respective rule numbers.

2. For nomenclature changes to part 1, see 68 FR 14335, Mar. 25, 2003; 87 FR 68904, Nov. 17, 2022.

#### § 1.620 Conduct of supplemental examination proceeding.

(a) Within three months after the filing date of a request for supplemental examination, the Office will determine whether a substantial new question of patentability affecting any claim of the patent is raised by any of the items of information presented in the request. The determination will generally be limited to a review of the item(s) of information identified in the request as applied to the identified claim(s) of the patent. The determination will be based on the claims in effect at the time of the determination and will become a part of the official record of the patent.

(b) The Office may hold in abeyance action on any petition or other paper filed in a supplemental examination proceeding until after the proceeding is concluded by the electronic issuance of the supplemental examination certificate as set forth in § 1.625.

(c) If an unauthorized or otherwise improper paper is filed in a supplemental examination proceeding, it will not be entered into the official file or considered, or if inadvertently entered, it will be expunged.

(d) The patent owner must, as soon as possible upon the discovery of any other prior or concurrent post-patent Office proceeding involving the patent for which the current supplemental examination is requested, file a paper limited to notifying the Office of the post- patent Office proceeding, if such notice has not been previously provided with the request. The notice shall be limited to an identification of the post-patent Office proceeding, including the type of proceeding, the identifying number of any such proceeding (*e.g.,* a control number or reissue application number), and the filing date of any such proceeding, without any discussion of the issues of the current supplemental examination proceeding or of the identified post-patent Office proceeding(s).

(e) Interviews are prohibited in a supplemental examination proceeding.

(f) No amendment may be filed in a supplemental examination proceeding.

(g) If the Office becomes aware, during the course of supplemental examination or of any reexamination ordered under 35 U.S.C. 257 as a result of the supplemental examination proceeding, that a material fraud on the Office may have been committed in connection with the patent requested to be examined, the supplemental examination proceeding or any reexamination proceeding ordered under 35 U.S.C. 257 will continue, and the matter will be referred to the U.S. Attorney General in accordance with 35 U.S.C. 257(e).

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 2 is placed in the separate grouping of parts pertaining to trademarks regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 6 is placed in the separate grouping of parts pertaining to trademarks regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 7 is placed in the separate grouping of parts pertaining to trademarks regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 1 is placed in the separate grouping of parts pertaining to patents regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 3 pertaining to both patents and trademarks is placed in the grouping pertaining to patents regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 4 is placed in the separate grouping of parts pertaining to patents regulations.

###### Editorial Note on Subchapter A of Chapter I

#### Editorial Note:

Part 5 is placed in the separate grouping of parts pertaining to patents regulations.