Article 115

Observations by third parties

(1) Following the publication of the European patent application, any person may present observations concerning the patentability of the invention in respect of which the application has been filed. Such observations must be filed in writing and must include a statement of the grounds on which they are based. That person shall not be a party to the proceedings before the European Patent Office.

(2) The observations referred to in paragraph 1 shall be communicated to the applicant for or proprietor of the patent who may comment on them.