Administrative Instructions under the Patent Cooperation Treaty

Section 314
Correction or Addition of a Priority Claim under Rule 26bis

(a)  Where the applicant, in a notice submitted to the receiving Office, corrects or adds a priority claim under Rule 26bis, that Office shall enter the correction or addition in the request, draw a line through, while still leaving legible, any indication deleted as a result of the correction, and enter, in the margin, the letters "RO."

(b)  The applicant and, if copies of the international application have already been sent to the International Bureau and the International Searching Authority, that Bureau and that Authority shall be promptly notified by the receiving Office of any correction or addition of a priority claim under Rule 26bis and of the date on which it received such correction or addition.