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90 - Patent Cooperation Treaty
§ 90bis.5 Signature
(a) Any notice of withdrawal referred to in Rules 90bis.1 to 90bis.4 shall, subject to paragraph (b), be signed by the applicant or, if there are two or more applicants, by all of them. An applicant who is considered to be the common representative under Rule 90.2(b) shall, subject to paragraph (b), not be entitled to sign such a notice on behalf of the other applicants.
(b) Where two or more applicants file an international application which designates a State whose national law requires that national applications be filed by the inventor and where an applicant for that designated State who is an inventor could not be found or reached after diligent effort, a notice of withdrawal referred to in Rules 90bis.1 to 90bis.4 need not be signed by that applicant ("the applicant concerned") if it is signed by at least one applicant and
(i) a statement is furnished explaining, to the satisfaction of the receiving Office, the International Bureau, or the International Preliminary Examining Authority, as the case may be, the lack of signature of the applicant concerned, or
(ii) in the case of a notice of withdrawal referred to in Rule 90bis.1(b), 90bis.2(d), or 90bis.3(c), the applicant concerned did not sign the request but the requirements of Rule 4.15(b) were complied with, or
(iii) in the case of a notice of withdrawal referred to in Rule 90bis.4(b), the applicant concerned did not sign the demand but the requirements of Rule 53.8(b) were complied with.
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