Patents by Inventor Stephen L. Walker

Stephen L. Walker 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).

  • Resins formed from alpha-beta-unsaturated monomers and unsaturated fatty acids
    Patent number: 5830957
    Abstract: A polymer is formed from a mixture of between about 85 and about 96 wt % .alpha.-.beta.-unsaturated monomers and between about 4 and about 15 wt % unsaturated fatty acids having between 10 and 30 carbons.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: November 3, 1998
    Assignee: Morton International, Inc.
    Inventors: Stephen L. Walker, Gary A. Deeter, George G. Stuart, II
  • Image receiving transparency and method of making
    Patent number: 4526847
    Abstract: A transparency for the formation of an adherent electrostatic image thereon includes a polyester resin film sheet having an image-receiving coating of nitrocellulose, a plasticizer, a particulate material, and, preferably, an antistatic agent. The coating is applied to the film sheet from a solvent mixture of an aliphatic ester or an aliphatic ketone, and an aliphatic alcohol.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: July 2, 1985
    Assignee: Weber Marking Systems, Inc.
    Inventors: Stephen L. Walker, Beatrice E. Thorpe