Unitary effect may be conferred on a European patent under the conditions laid down in the first paragraph of Article 3 of Regulation (EU) No 1257/2012 of 17 December 2012.
The European patent with unitary effect takes effect in France on the day of publication of the mention of the grant of the European patent in the European Patent Bulletin. From that date, the European patent is deemed not to have taken effect in France as a national patent.