Patent Act — P-4 28.4
Request for priority 28.4 (1) For the purposes of sections 28.1, 28.2 and 78.3, an applicant for a patent in Canada may request priority in respect of the application on the basis of one or more previously regularly filed applications. Requirements for request (2) The request for priority shall be made in accordance with the regulations and the applicant shall submit to the Commissioner the filing date, the name of the country or office of filing and the number of each previously regularly filed application on which the request is based. Request deemed never filed (2.1) Except for the purposes of subsection 10(3), a request for priority is deemed never to have been made if the request is not made in accordance with the regulations or if the applicant does not submit the information, other than the number of each previously regularly filed application, required under subsection (2). Withdrawal of request (3) An applicant may, in accordance with the regulations, withdraw a request for priority, either entirely or with respect to one or more previously regularly filed applications. Multiple previously regularly filed applications (4) If two or more applications have been previously regularly filed as described in paragraph 28.1(1)(a), subparagraph 28.2(1)(d)(i) or paragraph 78.3(1)(a) or (2)(a), either in or for the same country or in or for different countries, (a) paragraph 28.1(1)(b), subparagraph 28.2(1)(d)(iii) or paragraph 78.3(1)(b) or (2)(b), as the case may be, shall be applied using the earliest filing date of the previously regularly filed applications; and (b) subsection 28.1(2), subparagraph 28.2(1)(d)(ii) or paragraph 78.3(1)(d) or (2)(d), as the case may be, shall be applied using the earliest filing date of the previously regularly filed applications on the basis of which a request for priority is made. Withdrawal, etc., of previously regularly filed applications (5) A previously regularly filed application mentioned in section 28.1 or 28.2 or subsection 78.3(1) or (2) shall, for the purposes of that section or subsection, be considered never to have been filed if (a) on the filing date of one of the following applications, as the case may be, more than 12 months have elapsed since the filing date of the previously regularly filed application: (i) the pending application, in the case of section 28.1, (ii) the co-pending application, in the case of section 28.2, (iii) the later application, in the case of subsection 78.3(1), or (iv) the earlier application, in the case of subsection 78.3(2); (b) before the filing date of the application referred to in one of subparagraphs (a)(i) to (iv), as the case may be, another application (i) is filed by the person who filed the previously regularly filed application or by the agent, legal representative or predecessor in title of that person, (ii) is filed in or for the country where the previously regularly filed application was filed, and (iii) discloses the subject-matter defined by the claim in the application mentioned in paragraph (a); and (c) on the filing date of the other application mentioned in paragraph (b) or, if there is more than one such application, on the earliest of their filing dates, the previously regularly filed application (i) has been withdrawn, abandoned or refused without having been opened to public inspection and without leaving any rights outstanding, and (ii) has not served as a basis for a request for priority in any country, including Canada. Filing date deemed to be within 12 months (6) Subject to the regulations, for the purposes of paragraph 28.1(1)(b) and subparagraphs 28.2(1)(d)(iii) and 28.4(5)(a)(i) and (ii), the filing date of the pending application or the co-pending application, as the case may be, shall be deemed to be within 12 months after the filing date of the previously regularly filed application if (a) the filing date of the pending application or the co-pending application, as the case may be, is more than 12 months after th