Code of Federal Regulations Title 37. Patents, Trademarks, and Copyrights § 37.1.251 Unlocatable file

(i) A copy of the applicant's or patentee's record (if any) of all of the correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding (except for U.S. patent documents);

(ii) A list of such correspondence;  and

(iii) A statement that the copy is a complete and accurate copy of the applicant's or patentee's record of all of the correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding (except for U.S. patent documents), and whether applicant or patentee is aware of any correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding that is not among applicant's or patentee's records.

(i) Producing the applicant's or patentee's record (if any) of all of the correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding for the Office to copy (except for U.S. patent documents);  and

(ii) Providing a statement that the papers produced by applicant or patentee are applicant's or patentee's complete record of all of the correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding (except for U.S. patent documents), and whether applicant or patentee is aware of any correspondence between the Office and the applicant or patentee for such application, patent, or other proceeding that is not among applicant's or patentee's records.