Patents by Inventor Nicholas Pightling

Nicholas Pightling 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).

  • Photographic high-contrast silver halide materials
    Patent number: 5298362
    Abstract: High contrast graphic arts photographic materials exhibiting improved accuracy in image reproduction are comprised of a support, a silver halide emulsion layer having a chloride content of at least 50 mole percent, and a non-electroconductive hydrophilic colloid layer containing both a vinyl polymer and a hydrophilic colloid interposed between the support and the silver halide emulsion layer. A hydrazine nucleating agent is incorporated in or adjacent to the silver halide emulsion layer and the photographic material preferably also contains an amino compound which functions as a booster.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: March 29, 1994
    Assignee: Eastman Kodak Company
    Inventors: David Beaumond, Philip J. Coldrick, Nicholas Pightling