Patents by Inventor Gerard A. D. Friour

Gerard A. D. Friour 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 product comprising a blend of emulsions with different sensitivities
    Patent number: 5567579
    Abstract: The present invention concerns a photographic product containing at least one light-sensitive layer consisting of a blend of silver halide emulsions.The blend of the invention is formed by at least one pure bromide emulsion, the proportion of fast emulsion grains in the blend is less than 50% compared with the total number of silver halide grains, and the proportion of slow emulsion grains in the blend is greater than 20%.The present invention makes it possible to obtain a radiation-sensitive photographic product which has improved sensitivity and granularity.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: October 22, 1996
    Assignee: Eastman Kodak Company
    Inventors: Luc R. Gourlaouen, Gerard A. D. Friour, Didier J. Martin, Philippe Strauel
  • Dyes comprising thioether macrocycles
    Patent number: 5500337
    Abstract: The present invention relates to polymethine spectral sensitising dyes comprising at least one intracyclic thioether function macrocycle.These special sensitising dyes may be used in silver halide photographic products.These spectral sensitising dyes improve the sensitivity of the photographic products whilst reducing the residual dye stain.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: March 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Rejane Benard, Gerard A. D. Friour, Didier J. Martin, Marcel L. P. Riveccie