Patents by Inventor Ingrid K. Migliorini

Ingrid K. Migliorini 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).

  • Processing of kaolinitic clays at high solids under acidic conditions
    Patent number: 4650521
    Abstract: A process for beneficiating a crude kaolinitic clay mineral to produce a clay filler for use in papermaking to improve the brightness, the color characteristics and the light scattering efficiency of the paper product. The crude kaolin clay is blunged with water containing a dispersing agent consisting of a blend of from about 20% to about 50% by weight of a water-soluble carbonate, about 20% to about 50% by weight of a water-soluble polyacrylate, and from 0% to about 60% by weight of a water-soluble anionic phosphate, to form a high solids fluid aqueous clay suspension having an acidic pH. This clay suspension is then fractionated to reduce the percentage of particles therein larger than 45 microns to not more than 0.2% by weight. The fractionated clay suspension is treated with an alkaline leaching solution containing a reducing agent effective in converting ferric ions to ferrous ions.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: March 17, 1987
    Assignee: Georgia Kaolin Company, Inc.
    Inventors: Mitchell H. Koppelman, Ingrid K. Migliorini