Patents by Inventor David Thomas Southby

David Thomas Southby 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).

  • Patent number: 6007973
    Abstract: The invention provides a tightly wrapped photographic element comprising a support bearing at least one photographic silver halide emulsion having associated therewith at least one high dye-yield coupler that releases a dye having an electrically neutral dye chromophore, said element having a radius of curvature of less than 6,000 micrometers. The tightly wrapped photographic element exhibits less pressure sensitivity than conventional elements while maintaining satisfactory photographic response.This is a Continuation of application Ser. No. 08/565,122, filed Nov. 30, 1995, now abandoned, which is a Continuation of application Ser. No. 08/250,199, file May 27, 1994, now abandoned.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: December 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: David Thomas Southby, Richard Peter Szajewski
  • Patent number: 5830632
    Abstract: Photographic element are described comprising a support bearing a photographic silver halide emulsion layer having associated therewith a micro-precipitated dispersion of a high dye-yield coupler having the formula:COUP--(T).sub.m --L--DYEwhere COUP is the coupler moiety of the coupler capable of reacting at the coupling position with oxidized color developer to form a first dye, T is one or more timing groups with m=0, 1 or 2, L is a linking group selected from the group consisting of --OC(O)--, --OC(S)--, --SC(O)--, --SC(S)--, or --OC(.dbd.NSO.sub.2 R)--, where R is a substituted or unsubstituted alkyl or aryl group, and DYE is a second dye or precursor thereof comprising an electrically neutral chromophore. The invention also provides a photographic coupler dispersion, a photographic silver halide emulsion, and a process for forming an image in a photographic element in accordance with the invention.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: November 3, 1998
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, David Thomas Southby, David Hoke