A side note------R134A

I would be curious of Dupont's copyrights running down ,(.....?....) on 134,...... It sure went up, when Dupont (yes I know...it doesn't exist...) , lost copyrights on R12... Just a thought, not factual....
Probably more truth to that than anyone would want to admit. I wonder how many lobbyists DuPont has in DC?