Patents by Inventor Edmund Thompson Holmes

Edmund Thompson Holmes 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).

  • Inhibitor barrier layers for photographic materials
    Patent number: 4055429
    Abstract: A photographic element comprises a support, a silver halide emulsion layer and a layer containing a polymeric scavenger for development inhibitors. The movement of development inhibitor anions from layer to layer in a film, out of the film, or into the film from processing solutions, can be controlled by the presence of the polymeric scavenger layer.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: October 25, 1977
    Assignee: Eastman Kodak Company
    Inventors: Edmund Thompson Holmes, Gerald Allan Campbell