Patents by Inventor David D. Brooks

David D. Brooks 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).

  • Activated clay composition and method
    Patent number: 5908500
    Abstract: High performance acid activated clays suitable for bleaching oil are produced by contacting an intercalating clay mineral with a strong acid in a polar organic liquid.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: June 1, 1999
    Assignee: Oil-Dri Corporation of America
    Inventors: David D. Brooks, Darlene M. Hansen, Dov Shaked
  • Oil bleaching method and composition for same
    Patent number: 5004570
    Abstract: The present invention contemplates a method for treating oils having undesirable color impurities and an oil bleaching composition suitable for use in this method. The method comprises contacting the oil with the oil bleaching composition for a time period sufficient to reduce the amount of color impurities of the oil. The oil bleaching composition includes a neutral bleaching clay and a chelating polycarboxylic acid. The spent bleaching composition resists spontaneous combustion.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: April 2, 1991
    Assignee: Oil-Dri Corporation of America
    Inventors: David D. Brooks, Shirley A. Brophy, George R. Goss