According to Article 80 of the European Patent Convention (EPC)
, the date of filing of a European patent application shall be the date on which the requirements laid down in the Implementing Regulations are fulfilled.
According to Rule 40 of the Implementing Regulations to European Patent Convention (EPC)
(1)
The date of filing of a European patent application shall be the date on which the documents filed by the applicant contain:
(a)
an indication that a European patent is sought;
(b)