> > I'm guessing the patent on 134 runs out about then. > > The deal about R-12 was that Dupont could no longer control the world > supply, and therefore prices for R-12, so we had to figure out a way > to get rid of it. Dupont owns the 134 patent. Here we go again. >
As said patent issues for R-12 and -134a are urban legends stuff. By the cynic wonders how someone might figure how to modify CO2 (or combo with something else) to make THAT patentable and then the lobbyists make sure that's the only permitted blend. Also: With all the trouble with using circulating 120 bar CO2 as a fluid why not just go and compress AIR, dump heat under expansion, and use THAT? I can't pretend to know anything about the efficiency, and moisture would likely be an issue. But it gets me thinking... Tony Wirtel _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
