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The European Patent Convention

 
 

Article 123[ 141 ], [ 142 ]
Amendments

(1)
The European patent application or European patent may be amended in proceedings before the European Patent Office, in accordance with the Implementing Regulations. In any event, the applicant shall be given at least one opportunity to amend the application of his own volition. 
(2)
The European patent application or European patent may not be amended in such a way that it contains subject-matter which extends beyond the content of the application as filed. 
(3)
The European patent may not be amended in such a way as to extend the protection it confers. 
 
Amended by the Act revising the European Patent Convention of 29.11.2000. 
See decisions of the Enlarged Board of Appeal G 2/88, G 3/89, G 11/91, G 1/93, G 2/95, G 2/98, G 1/99, G 1/03, G 2/03, G 1/05, G 2/10 (Annex I).
References

Art. 100, 138
R. 4, 7, 18, 57, 58, 71, 78-82, 137, 138