Intellectual Property Law

Change in the Electronic Retrieval Method for Priority Documents between the USPTO and the European Patent Office

Effective January 1, 2022, electronic retrievals of priority documents between the United States Patent and Trademark Office (USPTO) and the European Patent Office are being managed via the World Intellectual Property Organization (WIPO) Digital Access Service (DAS).

For applications filed on or after January 1, 2022, the applicant must provide the WIPO DAS access code associated with the priority application. The transition to the WIPO DAS provides applicants with additional security via the requirement of the WIPO DAS access code, which serves as a third validation point for each application along with the application number and filing date. In addition, use of the WIPO DAS permits applicants to better manage and monitor the status of requested certified copy retrievals via the WIPO DAS applicant portal.

Learn more on our Electronic Priority Document Exchange Program webpage.


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