Patents by Inventor Francis D. Whillans

Francis D. Whillans 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).

  • Process for protecting magnetic particles with chromium oxide
    Patent number: 4382982
    Abstract: A method for the preparation of magnetic particulate matter coated with a protective layer of chromium(III) hydroxide, oxyhydroxide or oxide, optionally crosslinked with polyacrylic acid, which process comprises a first step of depositing a hydrogel of chromium(III) hydroxide onto magnetic material in a desired particulate form, a second step of heating to form chromium(III) hydroxide, oxyhydroxide or oxide, and a third optional step, which may precede or follow the said second step, of crosslinking with polyacrylic acid. The coated protected magnetic particles are useful for the preparation of composite magnetic polymeric particles for use in processes involving ion exchange, filtration and adsorption.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: May 10, 1983
    Assignees: ICI Australia Limited, Commonwealth Scientific and Industrial Research Organization
    Inventor: Francis D. Whillans