 On May 19, 1945, DuMont opened experimental W3XWT in Washington, D.C.

Paramount Pictures became a minority shareholder in DuMont Laboratories when it advanced $400,000 in 1939 for a 40% share in the company.Paramount had television interests of its own, having launched experimental stations in Los Angeles in 1939 and Chicago in 1940.DuMont's association with Paramount would later come back to haunt DuMont.