In order that examination of a European application can begin, the applicant is required to file a request for examination, which, however, is not deemed to be filed until after the examination fee has been paid. The request for examination may be filed from the date on which the application is filed up to the end of six months after the date on which the European Patent Bulletin mentions the publication of the European search report. If the request for examination is not filed within this period, the application is deemed to be withdrawn. However, in such a case, the applicant has the possibility of filing a request for further processing pursuant to Art. 121. According to Rule 70(1), the request for examination may not be withdrawn.
Subject to certain exceptions, the applicant must also respond to the search opinion within the above-mentioned period for filing the request for examination (see B‑XI, 9 and C‑II, 3.1), unless the EPO invites him to confirm an early request for examination according to Rule 70(2), in which case he must respond to the search opinion within the period provided for under Rule 70(2) (see C‑II, 1.1).