If any third parties wish to avail themselves of the possibility open to them under Art. 61(1)(a) (see A‑IV, 2.1(i)), they must declare their intention in writing to the EPO in due time. They then take the place of the erstwhile applicant. The proceedings for grant are continued from the point reached when they were stayed or when the declaration was filed by the third party (see A‑IV, 2.2).[Art. 61(1)(a); ]
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/a_iv_2_4.htm
Date retrieved: 17 May 2021