Patents by Inventor Sharon M. Simpson

Sharon M. Simpson 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).

  • Post-processing stabilization of photothermographic emulsions with amido compounds
    Patent number: 5158866
    Abstract: The post-processing stability of silver halide photothermographic emulsions is enhanced by the presence of stabilizing amounts of certain structurally defined amido compounds.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: October 27, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Sharon M. Simpson, Larry R. Krepski, Kumars Sakizadeh, David R. Whitcomb
  • Supersensitization of silver halide emulsions
    Patent number: 5013622
    Abstract: Supersensitization of silver halide emulsions is effected by the addition of a metal chelating agent after chemical sensitization or a combination of phenylmercaptotetrazoles and a metal chelating agent to a spectrally sensitized emulsion. The contrast of the emulsion may also be increased by the addition of this combination of materials after chemical and spectral sensitization.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: May 7, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Sharon M. Simpson, John R. Boon
  • Supersensitization of silver halide photothermographic emulsions
    Patent number: 4873184
    Abstract: Supersensitization of photothermographic silver halide emulsions is effected by the addition of a metal chelating agent to a photothermographic emulsion which is or becomes spectrally sensitized.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: October 10, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Sharon M. Simpson
  • Color photographic element containing three silver halide layers sensitive to infrared
    Patent number: 4619892
    Abstract: Full color photographic images are produced by exposure of a radiation-sensitive element comprising at least three silver halide emulsion layers. At least two silver halide emulsion layers are sensitized to infrared radiation. Selectively absorptive filter layers and/or differential sensitivities between emulsion layers are used to prevent exposure of other layers to radiation used to expose a single layer.
    Type: Grant
    Filed: November 7, 1985
    Date of Patent: October 28, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Sharon M. Simpson, John M. McQuade, John R. Boon