Since Dupont invented it, one would suppose Dupont once owned the patent for it. However, it would have expired or lapsed many years ago because they started using it in the early 1930s.
So, in other words, there is no patent for R-11.
I don't know. But the way to find out is www.USPTO.gov. The US Patent and Trademark Office. They allow searches by many criteria. It will take just a little work, but once you know how to search on USPTO, your power will increase.
Dupont
The patent was issued to Maurice A. McLean and Stephon D. Brown.
The patent for Viagra in in the United States is owned by the company Pfizer. Pfizer is a pharmaceutical business that has continuously and exclusively maintained the patent for the Viagra brand name and the drug Sildenafil.
MDMA is not currently protected by a patent. The closest thing is Alexander Shulgin's 1959 patent on "4 alkyl dialkoxy N methyl phenethylamines and their pharamcologically acceptible salts," which has expired.
had to have been the inventor George Beauchamp in 1931 as he owns the patent for electric Guitars and single coil pickups.
Depends on the type. Having all wheels driven can't be patented, but you can patent various ways of transferring the power.
To properly reference a patent in your research paper, include the patent number, title, inventor(s), assignee (company or individual who owns the patent), publication date, and the URL or database where the patent can be accessed. Use the appropriate citation style recommended by your academic institution or publisher.
Technically, a patent is granted to the inventors, but in practice, the corporation that employs the inventors owns the invention, the application and the resulting patents, if any, through an "assignment of rights" filed in the USPTO.
To cite a patent in a research paper or academic publication, include the patent number, title, inventor(s), assignee (company or individual who owns the patent), publication date, and the database or website where the patent can be found. Format the citation according to the citation style guide you are using, such as APA or MLA.
R134a is a refrigerant gas
Can you mix r134a with r410a?