Patents by Inventor Maurice Pfaff

Maurice Pfaff 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).

  • Color image-forming photographic reversal element with improved interimage effects
    Patent number: 4729943
    Abstract: A reversal photographic element comprising at least two dye image-forming units, at least one unit comprising(1) a first silver halide emulsion layer spectrally sensitized to a given region of the spectrum with which is associated a dye image-forming chromogenic coupler and(2) a second silver halide emulsion layer spectrally sensitized to a different region of the spectrum than the first and containing an interimage effect-forming means such as a development inhibitor-releasing coupler, which forms either a colorless compound or a dye which does not substantially take part in the formation of the image.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: March 8, 1988
    Assignee: Eastman Kodak Company
    Inventors: Maurice Pfaff, Regis Thomas