Patents by Inventor John C. Grigger

John C. Grigger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Concentrated aqueous latex of ethylene/C.sub.2 -C.sub.3 -perfluorocarbon copolymer or terpolymer
    Patent number: 4225482
    Abstract: A process for preparing an aqueous concentrated latex of a copolymer or terpolymer of ethylene and a C.sub.2 -C.sub.3 -perfluorocarbon by creaming a latex of 25-30% copolymer solids and recovering a concentrated latex having 1.5-2.5 times the concentration of the starting latex. The concentrated latex can be used to prepare crack-free or void-free coatings on substrates.
    Type: Grant
    Filed: December 12, 1978
    Date of Patent: September 30, 1980
    Assignee: Pennwalt Corporation
    Inventors: Richard A. Ferren, Daniel A. Dimmig, John C. Grigger