> > Curly wrote: > > > > >40 years ago we had to give up R-12 because of global cooling. > > >Now that we have global warming, why can't we use R-12 again? > > >Seems like it would counteract global warming. > > >Gerry > > > > That too was a hoax. We had to abandon r-12 because the dupont > > patent was expiring. They had the best pols money could buy, as > > well as extremist groups. > > Hmm. A patent is valid for 20 years - right? R-12 was developed > (patented?) in the 1930's. How then would the patent expire in the > 1990s? > > Maybe I'm missing something. Maybe I should do some research... > > -- Philip > I thought it was an interesting coincidence that DuPont just happened to have R-134 developed, tested, and ready to sell in large quantities about the time that R-12 was banned. Gerry
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