> Also, you should note that DuPont's patent on Freon, would have run out in
a
> few months, allowing anyone to manufacture it. The ban not only kept that
> from happening but it mandated everyone to get stuck changing every system
> over to r134a ensuring DuPont with another long manufacturing run without
> any competition!

 I used to subscribe to these conspiricy theories also. Freon was patented
in 1928. Correct me if I'm wrong but patents run out in seventeen years. So
everyone could manufacture it in 1945?