Patents by Inventor Mark U. Johnson

Mark U. Johnson 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).

  • Printing inks containing nucleated organic pigments
    Patent number: 4204871
    Abstract: Substitutes for inorganic pigments that are particularly suitable for use in printing inks comprise nucleated organic pigments prepared by reacting in aqueous solution primary aryl amines with at least one coupling component in the presence of a conditioned, highly dispersed inorganic material.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: May 27, 1980
    Assignee: Sun Chemical Corporation
    Inventors: Mark U. Johnson, Jules Rothmayer, Hugh M. Smith