Patents by Inventor Charles Richard Lee

Charles Richard Lee 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).

  • Patent number: 7914756
    Abstract: A method of treating alkaline industrial by-products, such as red mud generated by Bayer process bauxite refining, is described. Embodiments of the method comprise treating the alkaline industrial by-products with salts of divalent and/or polyvalent cations, thereby lowering pH of the alkaline industrial by-products. The method involves replacement reactions in which relatively insoluble hydroxide salts form precipitates, thereby removing hydroxide ions from solution.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: March 29, 2011
    Inventors: Philip N. Baldwin, Jr., Norman K. Murray, Charles Richard Lee, Michael W. Farrall