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Guide for applicants, Part 1: How to get a European patent

 
 
Grounds for opposition
179
Opposition may only be filed on the grounds that: 
— 
the patent's subject-matter is not patentable within the terms of Articles 52-57
— 
the patent does not disclose the invention clearly and completely enough for it to be carried out by a person skilled in the art 
— 
the patent's subject-matter extends beyond the content of the application as filed.