2.2.8 Indication of facts, evidence and arguments – substantiation of grounds for opposition
The question whether the requirements in R. 76(2)(c) EPC are met must be determined on expiry of the nine-month opposition period (R. 77(1) EPC). A notice objectively complying with the requirements on the relevant date is not rendered inadmissible where the opponent later cites prior art not mentioned in it to support his line of argument (T 1019/92; see also T 104/06).