Patents by Inventor Peter W. Griffiths

Peter W. Griffiths 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).

  • Patent number: 4588674
    Abstract: The laser imaging material comprises a laser-transparent support layer of, for example, polyester. A first overlying layer is laser-transparent and formed from a binder that is instantaneously thermally-chemically-decomposable with the production of a gas, for example, an acrylic or methacrylic homopolymer or copolymer, a cellulosic polymer, or a homopolymer or copolymer of stryene. A second overlying layer is formed from such a material, the same as or different from that of the first overlying layer, pigmented with carbon black. Upon laser irradiation through the support layer 10, selected portions of the carbon black are transferred to a suitable receptor surface such as paper or a lithographic plate.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: May 13, 1986
    Inventors: Malcolm J. Stewart, Andrew Hudson, Peter W. Griffiths