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A complete list of Patent Cooperation Treaty fee amounts which are to be paid to the United States Patent and Trademark Office, for both the national and international stages, can be found at the beginning of each weekly issue of the Official Gazette of the United States Patent and Trademark Office and on the PCT Legal Office page of the USPTO web site (see MPEP § 1730). Applicants are urged to refer to this list before submitting any fees to the USPTO.
Pursuant to PCT Rules 14.1(c), 15.4(a), and 16.1(f), the basic, transmittal, and search fee payable is the basic, transmittal, and search fee in effect on the filing date of the international application. See 37 CFR 1.431(c).
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