Patents by Inventor Robert W. Berriman

Robert W. Berriman 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).

  • Silver salt direct positive emulsion
    Patent number: RE29974
    Abstract: .Iadd.Light-sensitive photographic direct positive silver salt emulsions for use in photographic elements are disclosed. The emulsions contain silver salt grains, typically silver halide grains. The silver salt grains are comprised of a core containing centers which promote the deposition of photolytic silver and a shell covering the core. The shell is fogged and develops to silver without exposure. .Iaddend.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: April 24, 1979
    Assignee: Eastman Kodak Company
    Inventor: Robert W. Berriman