According to a statement of president Battistelli, published earlier today, “The Office underlines that the outcome of the referendum has no consequence on the membership of the UK to the European Patent Organisation, nor on the effect of the European Patents in the UK.

UK Referendum & EPO

Concerning the Unitary Patent and the Unified Patent Court, the Office expects that the UK and the participating Member States will find a solution as soon as possible which will allow a full implementation of these so-long awaited achievements.”
As it is obvious there will be no immediate changes to the European Patents and their effect, but the position of the UK in respect to the other Member States will have to be redefined in the following time period.