Re: A/C Upgrade?

[shields@tembel.org (Michael Shields)]

> [from Steve Buchholz]
> 
> >When you hear that R134 has to be handled in the same way as R12 in that
> >it is not to be deliberately vented into the atmosphere it makes me wonder
> >why is R12 so much worse than R134?  They are probably concerned that it
> 
> I wonder if that has anything to do with DuPont, the makers of R12, losing
> their patent on this pesky molecule at the end of this year. Ummmm . . .

Not true -- that patent was issued in the late '20s, and US patents run
for seventeen years (less for some types of patent).

http://worldserver.com/R-406a/peoples/ghg/talkshow/2.desc_freon_patent.au
is supposed to be a sound clip from George Goble explaining this, though
I'm at home now and don't have audio capability.
-- 
Shields.