Patents by Inventor Maurice E. Pfaff

Maurice E. 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).

  • Reversal color photographic material with a fine grain sublayer
    Patent number: 5552265
    Abstract: The invention relates to a reversal color photographic print material.Said reversal material comprises a support with, in order, a substantially light-insensitive fine grain emulsion layer which does not take part in the image formation, a red-sensitive emulsion layer having associated therewith a cyan-forming compler, a green-sensitive emulsion having associated therewith a magenta-forming coupler, a blue-sensitive emulsion having associated therewith a yellow-forming coupler.This arrangement allows to adjust the shape of the characteristic curve of red, green, blue-sensitive emulsion layers.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: September 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: Francois J. Bredoux, Maurice E. Pfaff
  • Photographic emulsions and elements capable of forming direct-positive images
    Patent number: 4315986
    Abstract: Silver halide emulsions are disclosed containing silver halide grains capable of forming an internal latent image. Incorporated in the emulsions is a diphenylmethane nucleating agent, thereby permitting a direct-positive image to be formed on imagewise exposure and photographic processing.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: February 16, 1982
    Assignee: Eastman Kodak Company
    Inventors: Roger M. Baralle, Marcel A. Compere, Maurice E. Pfaff, Claude G. Goumont
  • Photographic emulsions and elements capable of forming direct-positive images
    Patent number: 4306017
    Abstract: Silver halide emulsions are disclosed containing silver halide grains capable of forming an internal latent image. Incorporated in the emulsions as a nucleating agent is a dihydrospiropyran bis-condensation product of salicylic aldehyde and at least one heterocyclic ammonium salt, thereby permitting a direct-positive image to be formed on imagewise exposure and photographic processing.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: December 15, 1981
    Assignee: Eastman Kodak Company
    Inventors: Roger M. Baralle, Marcel A. Compere, Maurice E. Pfaff, Frederic X. Jordi, Claude G. Goumont
  • Photographic emulsions and elements capable of forming direct-positive images
    Patent number: 4306016
    Abstract: Silver halide emulsions are disclosed containing silver halide grains capable of forming an internal latent image. Incorporated in the emulsions as a nucleating agent is a heterocyclic compound having an arylaminovinylene or aryloxyvinylene substituent, thereby permitting a direct-positive image to be formed on imagewise exposure and photographic processing.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: December 15, 1981
    Assignee: Eastman Kodak Company
    Inventors: Roger M. Baralle, Marcel A. Compere, Maurice E. Pfaff, Frederic X. Jordi, Claude G. Goumont