Patents by Inventor Russell H. Gray

Russell H. Gray 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).

  • Photohardenable elements with a non-tacky matte finish
    Patent number: 4229518
    Abstract: A photohardenable element useful, for example, in color proofing and the like, additionally containing a protective top-coat comprised of tacky material, e.g. a layer containing unexposed photohardenable monomer and plasticizer, said top-coat being dusted with a powdered material capable of rendering the layer non-tacky and suitable for further handling. The powdered material additionally gives the surface of the element a matte finish.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: October 21, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Russell H. Gray, August D. Kuchta