Patents by Inventor Ronald W. McEwan

Ronald W. McEwan 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).

  • Direct process for the production of printing inks
    Patent number: 4664710
    Abstract: A direct process for the production of a printing ink base consists essentially of the steps of (1) reacting the starting ingredients for a pigment in an agitated vessel to obtain a product that contains pigment in mother liquor, (2) placing the product in a high horsepower, high shear mixer to transfer the pigment from the aqueous phase to a non-aqueous phase, and (3) while the material is still in the mixer, adding the necessary ingredients to make a printing ink base that can further be formulated into a printing ink.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: May 12, 1987
    Assignee: Sun Chemical Corporation
    Inventors: Francis E. Gleason, Deborah A. Emmert, Matthew McClure, Ronald W. McEwan