Vintage & Process Patent. Must Know's for Revere Buyers. All Old Revere Ware is not “Vintage” Revere. The copper cladding on Revere Ware distributes.
Revere Ware produced during the good years of 1939-1968 has a stamp on the bottom that includes a circle and either the words “Process Patent” or “Pat. Pend .
Vintage Revere Ware, manufactured before 1968 and carrying the prized " Process Patent" maker's mark on the thick copper bottom, is finding its way back into modern kitchens. (Photo courtesy of Blane van Pletzen-Rands). Revere Ware is a line of consumer and commercial kitchen wares introduced in 1939 by the.