What is "PDX"
"PDX" stands for "Priority Document Exchange" which provides for the electronic transmission of priority documents to and from participating foreign Intellectual Property Offices (if applicant files a request and an authorization) without payment of a fee.
The United States Patent and Trademark Office (USPTO) established agreements to obtain and provide priority documents with the European Patent Office (EPO) as of January 16, 2007, with the Japan Patent Office (JPO) as of July 28, 2007, with the Korean Intellectual Property Office (KIPO) as of October 14, 2008, and with the World
Intellectual Property Organization (WIPO) as of April 20, 2009.For more information regarding electronic priority document exchange between the USPTO and the WIPO see the PDX Web site at http://www.uspto.gov/web/patents/pdx/pdx.html. (31Jul2009)