Friday, January 15, 2016 T 108/12 A divisional application in the inescapable trap

The application of this appeal procedure is a divisional application. The Opponent argued during the Opposition procedure and during the Appeal Procedure that the divisional application extends beyond the disclosure of the mother application. This case shows once again that one has to be careful in changing something in the divisional application. The details of this case are a little bit mathermatical and the reasoning of the Board is strongly based on what would the skilled person in the field of security/encryption consider to be the teaching of the original application. One point of discussion is: Does the mother application provide enough support for  f(α)=f'(α) (as claimed in the divisional application), if the mother application teaches f(α)=f'(α)=α? Another point of discussion was: Does the mother application provide enough support for "a specific signature is kept private" (as claimed in the divisional application) while the mother application discloses that, in certain embodiments, the signature is not transmitted.
Ok, there were problems with support of the divisional application in the mother application, but the proprietor finally ends up in the inescapable trap. It is somehow sad to end up in the inescapable trap.