exxon / mobils 100mpg carb
 

Standard Oil which has become Exxon / Mobil owns a patten on a carborator that gave cars of the 1940's a 100 mpg. They still own the patten, no big secret why they keep under wraps. They make 30,000,000,000.00 in profits and keep a carborator thatwould give all of us 100mpg.??????????

Is this urban myth? How do we know this is true? What are your sources?

patents expire after 17 years. You can also do a patent search and look at any patents that have even been granted since 1790. So if there was a device patented in the '40s you can now legally manufacture and sell it all you want :)

A patent from the 1940s would have expired by the 1960s, and we'd have a patent on file showing us how this magic carburetor worked.

Carburetors are gone but the fuel-vaporization con angle is still around.

I thought you could tweak the original patent just a bit and still keep it / er, renew the patent. At least, that's the game big drug companies play.

Seems like we are getting our chain yanked a lot lately. This guy, spinningmarkviii, the free tank of gas guy, etc...

It's an urban legend that came out of the old Shell mileage competitions. They'd take something small like an Alpha, scrap the tread off the tires and inflate 'em up to whatever psi, shave the heads for more compression, run the carb lean, use pulse and glide, etc... to get high mileage out of passenger cars. Well, word does get around, but by the time most people hear it, it's gone from some guys screwing around and getting good mileage to a 100mpg carburettor. The peak right now seems to be about ~100-150mpg@ out of something w/ the same size and aerodynamics as a Honda Insight.\
Iirc, someone else can still make the original thingy per the original specs after 15 years, but a company will time the filing of patents so they always have exclusive rights to the latest and greatest version.

Gas Prices
 

When gas prices go above $3/gal (U.S. Avg.) -- stuff like this comes out of the woodwork...

RH77

PISSSTTTT

I have one of these carbs on my 1970 Honda Mini Trail. :)

And, if any individual wants to make it for his or her own use, he can.