2.2.8 Substantiation of grounds for opposition: indication of facts, evidence and arguments
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 their line of argument (T 1019/92; see also T 104/06).