1.1 What is the Euro-PCT Guide? 

1.1.001This publication is a guide for applicants interested in filing an application under the PCT. It focuses on the elements specific to the PCT procedure before the EPO and includes information on the procedure before the EPO as designated/elected Office. The information it provides is not to be considered complete, nor is it intended to replace relevant WIPO and EPO publications, decisions and notices concerning specific issues. 

1.1.002This is the 16th edition of the publication, which is further referred to as the "Euro-PCT Guide". 

1.1.003The Euro-PCT Guide is based on the information available on 1 January 2023. Any changes to the PCT procedures before the EPO after that date are not reflected in the information provided here. Therefore, in using this Guide, applicants should always verify in particular whether any relevant changes to the procedures have entered into force since 1 January 2023. Information on any changes made after that date can be found in the sources of information mentioned below (see points 1.3.001 ff).

1.1.004Although the information in this Guide is not exhaustive, it aims to cover all the important aspects of the procedures when the EPO acts in its capacity as: 

–receiving Office (RO), 

–International Searching Authority (ISA), 

–Supplementary International Searching Authority (SISA), 

–International Preliminary Examining Authority (IPEA) and/or 

–designated or elected Office. 

1.1.005Any comments on the Euro-PCT Guide may be addressed to Directorate 5.3.1, Patent Law and Processes (preferably by email to: international_pct_affairs@epo.org).