Patents by Inventor James D. Easton

James D. Easton 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).

  • Pigment compositions and methods of preparation
    Patent number: 4166811
    Abstract: Easily-dispersible pigment compositions suitable for the coloration of aqueous coating systems are prepared by contacting an aqueous slurry of the pigment with an alkaline solution of an acid resin and acidifying the mixture to insolubilize the resin. A pigment-resin composite is produced in which the pigment particles are effectively coated with the resin. On subsequently contacting the pigment-resin composite with a base, optionally in the vapor phase, the resin is neutralized and the pigment rendered easily dispersible in aqueous coating systems.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: September 4, 1979
    Assignee: Dominion Colour Company Ltd.
    Inventors: Peter W. Marr, Douglas W. Beattie, James D. Easton