Patents by Inventor Carole Allyson Maria Tapley

Carole Allyson Maria Tapley 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).

  • Zinc oxide dispersions
    Patent number: 5914101
    Abstract: A stabilised aqueous dispersion of particulate zinc oxide comprises water, a stabilising agent and zinc oxide, the particles of which are coated with dense amorphous silica. Useful stabilising agents include cellulose ethers which contain quaternary ammonium groups and polyalkylene glycols. The dispersions have excellent stability at high concentrations of zinc oxide and are useful for preparing sunscreen formulations, cosmetics and veterinary products.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: June 22, 1999
    Assignee: Tioxide Specialties Limited
    Inventors: Carole Allyson Maria Tapley, Philip Laurence Lyth, Iain Michael Harper