Patents by Inventor Gerry H. Ehrhardt

Gerry H. Ehrhardt 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).

  • Flow agent-dispersant composition
    Patent number: 5188765
    Abstract: Flow agent-dispersant composition for ink systems and the like comprising montan wax having from 3 to 10% of lecithin uniformly dispersed therein and a process for forming the same.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: February 23, 1993
    Assignee: Frederic S. Cluthe
    Inventor: Gerry H. Ehrhardt
  • Chemical carbonless copy paper and transfer medium therefor
    Patent number: 4347282
    Abstract: An improved chemical carbonless copy paper system including an improved hot melt type of coating for CB type pressure sensitive carbonless copy paper having discrete liquid droplets of metallic salt solution electron accepting chromogenic reagent material contained therein.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: August 31, 1982
    Assignee: Frye Copysystems, Inc.
    Inventors: Gerry H. Ehrhardt, Gene D. Carlson
  • Carbonless copy paper system
    Patent number: 4343494
    Abstract: An improved chemical carbonless copy paper system including an improved hot melt type of coating for one surface of pressure sensitive carbonless copy paper having discrete liquid droplets of metallic salt solution electron accepting chromogenic reagent material contained therein in operative association with an image receptor coating for the other surface of said paper employing tri (p-phenylamino) phenyl methanol as a dye precursor type chromogenic reagent material therein.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: August 10, 1982
    Assignee: Frye Copysystems, Inc.
    Inventors: Gerry H. Ehrhardt, Gene D. Carlson
  • Chemical carbonless copy paper and image receptor medium therefor
    Patent number: 4327939
    Abstract: Improved receptor or CF coating composition for chemical carbonless copy paper employing spirit blue in carbinol form as a dye precursor type chromogenic reagent material.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: May 4, 1982
    Assignee: Frye Copysystems, Inc.
    Inventors: Gerry H. Ehrhardt, Gene D. Carlson
  • Water insensitive image receptor coating
    Patent number: 4226442
    Abstract: A water insensitive image receptor coating composition for pressure sensitive carbonless type transfer media.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: October 7, 1980
    Assignee: Frye Copysystems, Inc.
    Inventors: Gene D. Carlson, Gerry H. Ehrhardt
  • Flow agent for ink systems
    Patent number: 3941608
    Abstract: An improved dispersant and flow agent for ink systems formed from a selectively oxidized linear unsaturated hydrocarbon having a carbon to carbon terminal double bond and a process for forming the same.
    Type: Grant
    Filed: May 23, 1973
    Date of Patent: March 2, 1976
    Assignee: Frye Copysystems, Inc.
    Inventors: Gerry H. Ehrhardt, Ronald L. Reeves