According to Art. 94(4) EPC, if the applicant fails to reply in due time to any communication from the examining division, the application shall be deemed to be withdrawn. Art. 94(4) EPC corresponds in essence to Art. 96(3) EPC 1973.
Source: http://www.epo.org/law-practice/legal-texts/html/caselaw/2019/e/clr_iv_b_2_7.htm
Date retrieved: 17 May 2021