Patents by Inventor John V. Holtzclaw

John V. Holtzclaw 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).

  • Supersensitizing bis-benzothiazolocyanine dye combination for red sensitive silver halide emulsions
    Patent number: 5464735
    Abstract: There is disclosed a photographic element comprising a layer of a silver halide emulsion containing a sensitizing combination of first and second cyanine red spectral sensitizing dyes according to structure I: ##STR1##
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: November 7, 1995
    Assignee: Eastman Kodak Company
    Inventors: Carl R. Preddy, John V. Holtzclaw