jimlongley wrote:Dupont never "lost" the patent, the patent expired, not quite the same thing, especially from someone so intent on getting the facts straight.JP171 wrote:rotor wrote:Freon R12 was banned I believe in 1995. What facts should I check? Virtually every car air conditioner used R12 prior to the ban. The ban was to "protect the ozone layer" You could go to Mexico and get R12 at any time so I guess we only protected the ozone layer across the US. There were never successful retrofits for R12 cars so if you wanted an air conditioned car in Texas you had to buy a new one. Same thing is happening now with CO2 tax but countries like China can dump as much as they want into the atmosphere.
OK I can agree with the spirit, but not the facts, first of all "Freon" is a brand name owned by DuPont and it encompasses many types of refrigerant, so yes R-12 or refrigerant formula 12 is banned, because DuPont lost the patent not because of anything else no matter what the politicians say. so yea check your facts. All CFC's or chlorinated fluorocarbons were banned at that time including R-502, R-12, R605 and several others, HCFC's are due to be banned very soon as in the next 2 years. All this is occurring because DuPont lost the patents and its been couched in lies by many including Al Gore. The countries that are signatory to the Montreal Protocol and no Mexico and most 3rd world countries are not signers as they don't have large use of the product, agreed to phase out any and all refrigerants containing Chlorine because of Ozone damage as the chlorine binds with the Oxygen molecule and damages the Ozone by removing 1 oxygen molecule but its a lie that we are causing global warming
as far as successful retrofit, its not necessary to change crap, r-134A is not quite as good as 12 but the oil is miscible in small systems, does not cause problems and works just fine, on top of that it has been addressed to show you that again you need to check your facts there is a drop in replacement that works just as well as r-12 it costs more but works just fine same as there are several drop in replacements for r-22 the stuff you use in your house AC so please don't compare apples the libtards and don't speak on a subject you obviously know nothing about
In 1996, my Jeep Dealer replaced the R12 in my 1993 Grand Cherokee with R134, swore it was a government requirement and that it was same for same, and it not only did not cool near as well, it did cause problems that had to be fixed by Jeep, but not until after I went to war with them. Of course the puncture that the dealership put in the evaporator when the tech rammed a thermometer into the coils might have had something to do with it.
ok so DuPont didnt loose the patent it expired and the gubbermint refused to allow another extension( as the fact that it was being produced under license by about 20 different companies) of the patents for the types of refrigerant that were phased out, not that it makes any appreciable difference to the effective action. I did in my post say that r 134a was not as good and do agree in a r 12 system it wouldn't be as good as there is a metering device that is calibrated for r 12 not 134a so yea you loose a little capacity. If a tech "rammed" a thermometer in the coils or coil, condenser coil then that was done out of spite not any functional need. Also R-134a will be pahsed out by the EU in 2017 and the US by 2020 its not patent driven this time but rather by a study that shows the refrigerant stays as as refrigerant for almost 6 months up in the O3 layer and causes Al Gore to spout more hot air
