"The Teflon™ trademark was coined by Chemours and registered in 1945; the first products were sold commercially under the trademark beginning in 1946. Applications and product innovations snowballed quickly. Today, the family of Teflon™ fluoropolymers from Chemours consists of: PTFE, the original resin; FEP, introduced in 1960; Tefzel™ ETFE in 1970; and PFA, in 1972."
https://www.ecowatch.com/epa-finds-replacements-for-toxic-teflon-chemicals-toxic-2620083129.html
