Patents by Inventor Cheryl D.. Krieger

Cheryl D.. Krieger 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: 5486228
    Abstract: A washable multiple coloring composition system is disclosed whose coloring effect is changed upon treatment with a second coloring composition, once the second coloring composition has been deposited over the undercolor coloring composition. The washable multiple ink system comprises:(a) an undercolor aqueous coloring composition comprising a compatable surfactant in an amount sufficient to provide washability and an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater and/or by a reducing agent; and(b) an overcolor aqueous coloring composition comprising a compatable surfactant in an amount sufficient to provide washability, a colorant capable of maintaining its characteristic color in the presence of a pH of about 10 or greater and/or a reducing agent, a base in an amount sufficient to yield a pH of the overcolor composition of about 10 or greater, and/or a reducing agent.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: January 23, 1996
    Assignee: Binney & Smith Inc.
    Inventors: Richard E. Miller, Charlene R. Couch, Cheryl D.. Krieger