Patents by Inventor Charles M. Darmon

Charles M. Darmon 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).

  • Process for stabilizing photographic elements
    Patent number: 5037725
    Abstract: A process for stabilizing the magenta dye image in a photographic color element comprises the step of treating the element after the step of color developing and prior to the step of bleaching or bleach-fixing with an aqueous solution that has a pH in the range of 7 to 10 and contains an effective amount of an alkali metal formaldehyde bisulfite.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: August 6, 1991
    Assignee: Eastman Kodak Company
    Inventors: Ann M. Cullinan, Charles M. Darmon, William G. Henry, Paul A. Schwartz