Patents by Inventor Gregg P. Bryant

Gregg P. Bryant 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 element containing a red dye-forming pyrazolotriazole coupler
    Patent number: 6638701
    Abstract: Disclosed is a photographic element comprising a a light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye forming coupler having formula I in which is and L1 is linked to the C atom; L1 is a carbon atom of the triazole ring, substituted by one or two alkyl or aryl groups; L2 is a chain of one or two carbon atoms that may be further substituted by alkyl or aryl groups; R1 is selected from the group consisting of alkyl groups containing 1-3 carbon atoms; R2 is selected from the group consisting of hydrogen, alkyl and aryl groups; R3 is a substituted carbonyl, carbamoyl, sulfonyl, or sulfamoyl group; and X is H or a coupling-off group. Such an element provides a red dye forming coupler of improved stability.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: October 28, 2003
    Assignee: Eastman Kodak Company
    Inventors: Mbiya Kapiamba, David G. Lincoln, James L. Edwards, Gary M. Russo, Gregg P. Bryant
  • Method of passivating a silver donor with a dye and photothermographic systems made thereby
    Patent number: 6576411
    Abstract: The invention is directed to a color photothermographic film in which particles comprising an organic silver salt is treated with a dye that functions as a passivating agent. In particular, the present invention involves passivating the organic silver salts with a dye that blocks the surface of the organic silver salt or ligand, resulting in a reduction of speed loss. The invention is also directed to a method of making a photothermographic element to improve raw stock keeping.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: June 10, 2003
    Assignee: Eastman Kodak Company
    Inventors: Mark E. Irving, Gregg P. Bryant, JoAnn D. Hanna, Mark R. Mis, Nancy B. Liebert
  • Method of passivating silver donors in photothermographic systems and imaging elements made thereby
    Patent number: 6497999
    Abstract: The invention is directed to a color photothermographic film in which particles comprising an organic silver salt is treated with a passivating agent. In particular, the present invention involves passivating the organic silver salts with an organic adsorbate that blocks the surface of the organic silver salt or ligand, resulting in a reduction of speed loss. The invention is also directed to a method of making a photothermographic element to improve raw stock keeping.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: December 24, 2002
    Assignee: Eastman Kodak Company
    Inventors: Gregg P. Bryant, JoAnn D. Hanna, Nancy B. Liebert, Mark E. Irving