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 History PET was patented in 1941 by John Rex Whinfield, James Tennant Dickson and their employer the Calico Printers' Association of Manchester, England. E. I. DuPont de Nemours in Delaware, USA, first used the trademark Mylar in June 1951 and received registration of it in 1952.[11] It really is still the best-known name used for polyester film. The existing owner of the trademark is DuPont Teijin Films US, a partnership with a Japanese company.[12] In the Soviet Union, PET was initially made in the laboratories of the Institute of High-Molecular Compounds of the USSR Academy of Sciences in 1949, and its own name "Lavsan" means thereof (лаборатории Института высокомолекулярных соединений Академии наук СССР).[13] YOUR PET bottle was patented in 1973 by Nathaniel Wyeth.[14] Physical properties Sailcloth is typically created from PET fibers generally known as polyester or beneath the brand Dacron; colorful lightweight spinnakers are generally made of nylon. PET in its natu