Yes, Kevlar is a trademarked term for a type of para-aramid synthetic fiber developed by DuPont. While the specific formulation of Kevlar is patented, the use of para-aramid fibers in general is not restricted by patent.
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.
US patent 3063966 was awarded November 13, 1962, to DuPont researcher Stephanie Kwolek, for "Process of making wholly aromatic polydamides."
The patent was issued to Maurice A. McLean and Stephon D. Brown.
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.
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.
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.
The protective plates, depending on the age of it, will be steel, ceramics, or kevlar.
KEVLAR! KEVLAR!