Patents by Inventor Christopher A. Povirk

Christopher A. Povirk 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).

  • Color toner
    Patent number: 5998079
    Abstract: The invention relates to a color toner composition comprising at least a binder resin and a colorant, and further comprising at least two charge control agents, wherein at least one of said charge control agents is a boron-containing compound, and at least two post-additive compounds used to treat the surface of said color toner.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: December 7, 1999
    Assignee: International Communication Materials, Inc.
    Inventors: Richard J. Thompson, Mark J. Winfield, Christopher A. Povirk