Patents by Inventor David D. Brooke

David D. Brooke 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).

  • Oil bleaching method and composition for same
    Patent number: 5151211
    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: April 2, 1991
    Date of Patent: September 29, 1992
    Assignee: Oil-Dri Corporation of America
    Inventors: David D. Brooke, Shirley A. Brophy, George R. Goss