Patents by Inventor Donovan E. Kvalnes

Donovan E. Kvalnes 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).

  • Azeotrope or azeotrope-like composition of trichlorotrifluoroethane and dichlorodifluoroethane
    Patent number: 4873021
    Abstract: An azeotrope or azeotrope-like composition of 1,1,2-trichloro-1,2,2-trifluoroethane (FC-113) and 1,2-dichloro-1,1-difluoroethane (FC-132b), the azeotrope being useful in solvent cleaning applications.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: October 10, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Gorski, Bernhardt J. Eiseman, Jr., Donovan E. Kvalnes