Patents by Inventor Douglas E. Bugner

Douglas E. Bugner 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: 4803017
    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: February 7, 1989
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, Peter S. Alexandrovich
  • Toners and developers containing benzyldimethylalkylammonium charge-control agents
    Patent number: 4789614
    Abstract: New electrostatographic toners and developers are provided containing new charge-control agents comprising quaternary ammonium salts having the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: December 6, 1988
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, Peter S. Alexandrovich
  • Electrographic toner and developer composition containing quaternary ammonium salt charge-control agent
    Patent number: 4684596
    Abstract: The present invention relates to the use of quaternary ammonium salt as a charge-control agent for electrostatic toner contained in a dry developer composition. The dry, particulate, electrostatic toner composition of the present invention comprises(a) a polymeric binder and(b) a charge-control agent comprising an N-benzyl quaternary ammonium salt, wherein the benzyl ring contains at least one substituent with a Hammett substituent constant that is greater than zero.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: August 4, 1987
    Assignee: Eastman Kodak Company
    Inventors: Steven M. Bonser, Douglas E. Bugner, Lawrence P. Demejo