Patents by Inventor Donald, Jr. Singleton

Donald, Jr. Singleton 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 comprising a combination of a development inhibiting releasing coupler and a bleach accelerator releasing compound
    Patent number: 5300406
    Abstract: A color photographic element comprises a support bearing at least one photographic silver halide emulsion layer, an image dye-forming coupler, and a combination of a development inhibitor releasing coupler and a wash-out coupler, the washout coupler (A)(i) capable of forming a compound that is washed out of the photographic element upon processing and(ii) capable of releasing a bleach accelerator group, and(iii) is represented by the formula:(SOL).sub.x --COUP--(R.sup.1).sub.y --(R.sup.2).sub.z --BLEACHThe development inhibitor releasing coupler is selected from a timed and non-timed development inhibitor releasing coupler.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: April 5, 1994
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Stephen P. Singer, David T. Southby, Donald, Jr. Singleton