Notice of appeal shall be filed, in accordance with the Implementing Regulations, at the European Patent Office within two months of notification of the decision. Notice of appeal shall not be deemed to have been filed until the fee for appeal has been paid. Within four months of notification of the decision, a statement setting out the grounds of appeal shall be filed in accordance with the Implementing Regulations.
Source: http://www.epo.org/law-practice/legal-texts/html/epc/2016/e/ar108.html
Date retrieved: 17 May 2021