Mistakes to avoid
Obtaining a patent in France: the opposition procedure

Insofar as the grounds for opposition and the contested claims cannot be extended after the expiry of the opposition period, it is advisable to try to start from as broad a basis of contestation as possible, in order to preserve the possibility of putting forward a maximum number of arguments on as many claims as possible during the opposition procedure. This allows the opponent, for example, to argue a ground for opposition that may not have been considered relevant at the outset.