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§ 91.1 Rectification of Obvious Mistakes - Appendix T Patent Cooperation Treaty
§ 91.1 Rectification of Obvious Mistakes
(a) An obvious mistake in the international application or another document submitted by the applicant may be rectified in accordance with this Rule if the applicant so requests.
(b) The rectification of a mistake shall be subject to authorization by the "competent authority", that is to say:
(i) in the case of a mistake in the request part of the international application or in a correction thereof-by the receiving Office;
(ii) in the case of a mistake in the description, claims or drawings or in a correction thereof, unless the International Preliminary Examining Authority is competent under item (iii)-by the International Searching Authority;
(iii) in the case of a mistake in the description, claims or drawings or in a correction thereof, or in an amendment under Article 19 or 34, where a demand for international preliminary examination has been made and has not been withdrawn and the date on which international preliminary examination shall start in accordance with Rule 69.1 has passed-by the International Preliminary Examining Authority;
(iv) in the case of a mistake in a document not referred to in items (i) to (iii) submitted to the receiving Office, the International Searching Authority, the International Preliminary Examining Authority or the International Bureau, other than a mistake in the abstract or in an amendment under Article 19-by that Office, Authority or Bureau, as the case may be.
(c) The competent authority shall authorize the rectification under this Rule of a mistake if, and only if, it is obvious to the competent authority that, as at the applicable date under paragraph (f), something else was intended than what appears in the document concerned and that nothing else could have been intended than the proposed rectification.
(d) In the case of a mistake in the description, claims or drawings or in a correction or amendment thereof, the competent authority shall, for the purposes of paragraph (c), only take into account the contents of the description, claims and drawings and, where applicable, the correction or amendment concerned.
(e) In the case of a mistake in the request part of the international application or a correction thereof, or in a document referred to in paragraph (b)(iv), the competent authority shall, for the purposes of paragraph (c), only take into account the contents of the international application itself and, where applicable, the correction concerned, or the document referred to in paragraph (b)(iv), together with any other document submitted with the request, correction or document, as the case may be, any priority document in respect of the international application that is available to the authority in accordance with the Administrative Instructions, and any other document contained in the authority's international application file at the applicable date under paragraph (f).
(f) The applicable date for the purposes of paragraphs (c) and (e) shall be:
(i) in the case of a mistake in a part of the international application as filed-the international filing date;
(ii) in the case of a mistake in a document other than the international application as filed, including a mistake in a correction or an amendment of the international application-the date on which the document was submitted.
(g) A mistake shall not be rectifiable under this Rule if:
(i) the mistake lies in the omission of one or more entire elements of the international application referred to in Article 3(2) or one or more entire sheets of the international application;
(ii) the mistake is in the abstract;
(iii) the mistake is in an amendment under Article 19, unless the International Preliminary Examining Authority is competent to authorize the rectification of such mistake under paragraph (b)(iii); or
(iv) the mistake is in a priority claim or in a notice correcting or adding a priority claim under Rule 26bis.1(a), where the rectification of the mistake would cause a change in the priority date;
provided that this paragraph shall not affect the operation of Rules 20.4, 20.5, 26bis and 38.3.
(h) Where the receiving Office, the International Searching Authority, the International Preliminary Examining Authority or the International Bureau discovers what appears to be a rectifiable obvious mistake in the international application or another document, it may invite the applicant to request rectification under this Rule.
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