Article 99 69
(1) Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid.
(2) The opposition shall apply to the European patent in all the Contracting States in which that patent has effect.
(3) An opposition may be filed even if the European patent has been surrendered or has lapsed for all the designated States.
(4) Opponents shall be parties to the opposition proceedings as well as the proprietor of the patent.
(5) Where a person provides evidence that in a Contracting State, following a final decision, he has been entered in the patent register of such State instead of the previous proprietor, such person shall, at his request, replace the previous proprietor in respect of such State. By derogation from Article 118, the previous proprietor and the person making the request shall not be deemed to be joint proprietors unless both so request.