1. Admissibility of the appeal
1.1 The appeal is admissible.
1.2 As regards the admissibility of the present appeal, the board agrees with the findings that the board of appeal set out in T 0457/89. Accordingly, under Article 107, first sentence, EPC, the appeal is open to those who were parties to the proceedings which led to the contested decision, in so far as they are adversely affected by the decision.
1.3 In the present case, the appellant is the proprietor of the granted European patent no. 2 565 891 and was therefore a party to the opposition proceedings that had been initiated on the basis of the opposition filed by the respondent. Consequently, the appellant is also adversely affected by the decision of the opposition division by which it revoked the granted European patent under Article 101(2) EPC.
1.4 As the board of appeal pointed out in T 0457/89, by analogy with the decision of the Enlarged Board of Appeal G 1/88, the appeal by a party to the opposition proceedings is not inadmissible because that party failed to file observations within the time limit in response to the invitation by the opposition division under Article 101(2) EPC. According to section 3.1 of the decision G 1/88, a possible loss of rights as a consequence of an omission is always explicitly mentioned in the EPC. Article 101(2) EPC does not provide for such a loss of rights.
Failure to respond to an invitation to do so by the opposition division in a communication, as was the case here, cannot therefore be considered as an implicit waiver of further participation or an implicit withdrawal of a request for oral proceedings.
1.5 The present appeal, which complies with the requirements under Article 108 EPC and Rule 99(2) EPC, is therefore admissible.
1.6 At the oral proceedings before the board, the respondent agreed with the above assessment, which had already been set out in essentially identical wording in the board's communication under Article 15(1) RPBA.
2. Admittance of the main request and auxiliary request into the appeal proceedings (Article 12(6) RPBA)
2.1 As set out in paragraph II above, the appellant made no observations on the opposition in the proceedings before the opposition division on the merits. With the statement of grounds of appeal, the appellant then filed for the first time a new main request and a new auxiliary request, requesting that the patent be maintained in amended form.
2.2 According to Article 12(6) RPBA, the board shall not admit requests, facts, objections or evidence which should have been submitted in the proceedings leading to the decision under appeal, unless the circumstances of the appeal case justify their admittance.
2.3 In the present case, the reasons stated in the contested decision essentially corresponded to what was submitted by the respondent in the grounds for opposition and the appellant would thus have had reason and opportunity to file these requests already in the proceedings before the opposition division. By failing to do so, the appellant prevented the opposition division from taking a decision on these requests.
It is further to be noted that the appeal procedure is not a continuation of the first-instance procedure, but serves the primary purpose of judicial review of the contested decision (Article 12(2) RPBA).
2.4 Throughout the appeal proceedings, the appellant has not indicated any specific circumstances of the appeal case that could justify the admittance of the new requests into the appeal proceedings within the meaning of Article 12(6) RPBA. In its communication pursuant to Article 15(1) RPBA, the board had already announced the expected non-admittance of the main request and the auxiliary request (see paragraph III above and the respective communication of the board under point 11). However, the appellant did not provide any justification either in writing or at the oral proceedings.
2.5 In the absence of any arguments in this regard on the part of the appellant and as no justifying circumstances are apparent to the board either, it exercised its discretion under Article 12(6) RPBA not to admit the main request and the auxiliary request into the appeal proceedings.
3. Result
Since the appeal was admissible, but neither of the appellant's requests was admitted into the appeal proceedings, the board had to accede to the respondent's request.
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