Patents by Inventor Douglas E. Eugner

Douglas E. Eugner 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).

  • Quaternary ammonium salts
    Patent number: 4834921
    Abstract: New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: May 30, 1989
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Eugner, Peter S. Alexandrovich, Lawrence P. DeMejo, Robert A. Guistina