Opposition may only be filed on the grounds that:

(a) the subject-matter of the European patent is not patentable under Articles Article 52 to Article 57;

(b) the European patent does not disclose the invention in a manner sufficiently clear and complete for it to be carried out by a person skilled in the art;

(c) the subject-matter of the European patent extends beyond the content of the application as filed, or, if the patent was granted on a divisional application or on a new application filed under Article 61, beyond the content of the earlier application as filed.

Notes

1. See decisions/opinions of the Enlarged Board of Appeal G 3/89, G 10/91, G 11/91, G 1/95, G 2/95, G 7/95, G 1/99, G 3/04 (Annex I).