Patents by Inventor Edward G. Bourne

Edward G. Bourne 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 halide emulsion sensitized with a heavy metal compound and a thiourea compound
    Patent number: 5283168
    Abstract: The invention is generally accomplished when a heavy metal compound and a substituted thiourea sensitizer are used together as chemical sensitizers. There is a surprising increase in photographic efficiency and, therefore, in photographic sensitivity. This effect does not depend on the presence of a dye. The preferred heavy metal compound is potassium hexachloroiridate (IV), and the preferred thiourea is 3-acetamidophenyl thiourea.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: February 1, 1994
    Assignee: Eastman Kodak Company
    Inventors: Roger W. Nelson, Edward G. Bourne