Rule 155 Filing and transmission of the request for conversion
Part VIII – Implementing Regulations to Part VIII of the Convention
(1) The request for conversion referred to in Article 135, paragraph 1(a) or (b), shall be filed within three months of the withdrawal of the European patent application, or of the communication that the application is deemed to be withdrawn, or of the decision refusing the application or revoking the European patent. The effect of the European patent application under Article 66 shall lapse if the request is not filed in due time.
(2) When transmitting the request for conversion to the central industrial property offices of the Contracting States specified in the request, the central industrial property office concerned or the European Patent Office shall attach to the request a copy of the file relating to the European patent application or European patent.