Over at
IPcopy an interesting problem regarding the request for unitary effect was signaled. It appears that under some interpretation of regulation 1257/2012, unitary effect is not available for any European patent application that was filed before 1 March 2007.
The argument runs as follows: Article 3(1) of regulation 1257/2012 requires for unitary effect "a European patent granted with the same set of claims in respect of all the participating Member States". The same article further state that `A European patent granted with different sets of claims for different participating Member States shall not benefit from unitary effect.´
