Patents by Inventor Stephen C. Grocott

Stephen C. Grocott 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).

  • Liquor oxalate stabilizers
    Patent number: 5385586
    Abstract: A method for inhibiting the precipitation of sodium oxalate crystals in a Bayer process liquor. The method comprises the step of adding to the Bayer process liquor, after red mud separation and immediately prior to crystallization of alumina trihydrate, or during crystallization of alumina trihydrate, or during classification of alumina trihydrate, an effective amount of a cationic, surface active, alkylammonium salt compound.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: January 31, 1995
    Assignee: Nalco Chemical Company
    Inventors: Graeme J. Farquharson, John D. Kildea, Anthony E. Gross, Stephen C. Grocott