Patents by Inventor Jenifer L. Robb

Jenifer L. Robb 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).

  • Aqueous dispersions of acicular titanium dioxide
    Patent number: 5068056
    Abstract: An aqueous dispersion of acicular fine particle size titanium dioxide containing from 20 to 60% by weight solids content and a polycarboxylic dispersant is of outstanding use in the preparation of sun screens. The dispersions are transparent to visible light and absorbant to UV light of broad spectrum. Usually the titanium dioxide has a largest dimension within the range 0.01 to 0.15 micron.The dispersions are produced by milling, preferably in a high speed mill, until the required UV absorbancy is attained.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: November 26, 1991
    Assignee: Tioxide Group PLC
    Inventor: Jenifer L. Robb