Patents by Inventor Rachael L. Parry

Rachael L. Parry 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).

  • Treatment process
    Patent number: 5032425
    Abstract: A process of coating or encapsulating an inorganic powder is described in which the powder, preferably a pigment, is dispersed in an aqueous medium and an ethylenically unsaturated monomer is polymerized in the presence of the powder and while subjecting the reaction mixture to ultrasonic vibrations. The monomer is present in an amount not exceeding 200% by weight of the powder and preferably is an acrylate or methacrylate.The powder has a cationic charge on its surface which can be generated by treatment of the surface with, preferably an aluminium salt.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: July 16, 1991
    Assignee: Tioxide Group PLC
    Inventors: Ian Livsey, Rachael L. Parry