Patents by Inventor Judith F. Tooze

Judith F. Tooze 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).

  • Method for preparing pigments
    Patent number: 5242557
    Abstract: A method for preparing pigmentary titanium dioxide is claimed. An aqueous solution of a titanium halide is mixed with 0.1 to 1.0% by weight titanium dioxide nuclei and the resultant mixture is heated in a sealed vessel to 150.degree. to 300.degree. C. at which temperature it is maintained for at least 15 minutes. The mixture is subjected to ultrasonic vibrations for at least a part of the heating process.The product of the process is useful as a white pigment without need for further treatment to optimise its particle size.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: September 7, 1993
    Assignee: Tioxide Group Services Limited
    Inventors: William J. Jones, Judith F. Tooze