Patents by Inventor Thomas S. Wald

Thomas S. Wald 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).

  • Thermally-sensitive record material
    Patent number: 5484758
    Abstract: A binder formulation for improving the water resistance, especially the warm water resistance, of thermally-sensitive record material comprises a major proportion of an amide ammonium salt of a substantially non-esterified styrene/maleic anhydride copolymer and a minor proportion of polyvinyl alcohol.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: January 16, 1996
    Assignee: The Wiggins Teape Group Limited
    Inventor: Thomas S. Wald