A.99 EPC Opposition

(1)
Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition 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)
Opponents shall be parties to the opposition proceedings as well as the proprietor of the patent. 
(4)
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. Notwithstanding Article 118, the previous proprietor and the person making the request shall not be regarded as joint proprietors unless both so request.
 
[ Art. 105 R. 3 6 14 73 76 78 84 86 89 112 142 143 ]
Amended by the Act revising the European Patent Convention of 29.11.2000. 
See decisions/opinions of the Enlarged Board of Appeal G 4/88, G 5/88, G 7/88, G 8/88, G 10/91, G 9/93, G 1/95, G 7/95, G 3/97, G 4/97, G 3/99, G 1/02, G 2/04, G 3/04 (Annex I).

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EPC Articles

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EPC Rules relating to Fees

EPO Guidelines - D Opposition and Limitation/Revocation Procedures

EPO Guidelines - E General Procedural Matters

EPO Guidelines - H Amendments and Corrections

Offical Journal of the EPO

Case Law Book

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Case Law Book: IV Divisional Applications

Case Law of the Enlarged Board

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