https://www.uspto.gov/patents/basics/international-protection/electronic-priority-document-exchange-pdx?utm_campaign=subscriptioncenter&utm_content=&utm_medium=email&utm_name=&utm_source=govdelivery&utm_term=
Information for the electronic priority document exchange (PDX) program and the WIPO Digital Access Service (WIPO DAS).
priority documentelectronicexchangepdxprogram