1.4. The examination of clarity in opposition proceedings

Art. 84 EPC is not a ground for opposition. However, when substantive amendments are made to a patent during an opposition, consideration has to be given to whether the amendments introduce any contravention of any requirement of the EPC, including Art. 84 EPC (T 301/87, OJ 1990, 335; T 656/07, see also chapter IV.D.4.5 "Scope of examination in the case of amendments").

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