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  • Patent Index 2020
European Patent Convention
  1. Home
  2. Legal texts
  3. European Patent Convention
  4. Contents
  5. European Patent Convention
  6. Part V
  7. Article 105
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Part V – Opposition and limitation procedure

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Article 105113, 114
Intervention of the assumed infringer

(1) Any third party may, in accordance with the Implementing Regulations, intervene in opposition proceedings after the opposition period has expired, if the third party proves that  

(a) proceedings for infringement of the same patent have been instituted against him, or 

(b) following a request of the proprietor of the patent to cease alleged infringement, the third party has instituted proceedings for a ruling that he is not infringing the patent. 

(2) An admissible intervention shall be treated as an opposition. 


113Amended by the Act revising the European Patent Convention of 29.11.2000.

114See decisions of the Enlarged Board of Appeal G 4/91, G 1/94, G 2/04, G 3/04, G 1/05 (Annex I).

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