I'm interested in contacting any relatives of George Washington Rappleyea, who was born July 4, 1894 and died in August, 1966. He was the inventor of a construction material he named "Plalsmofalt," which was the subject of an article in Popular Mechanics in Sept., 1952. I corresponded briefly with him in 1965. I'm interested in finding out more about Plasmofalt. I've seen his 3 patents, but I want more information.