Patents by Inventor Ben B. Buchanan

Ben B. Buchanan 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).

  • Water purification by treating with activated carbon before biochemical treatment
    Patent number: 4066538
    Abstract: Waste water having a high chemical oxygen demand caused primarily by soluble organic matter is treated with activated carbon and thereafter passed to a biochemical treating operation.
    Type: Grant
    Filed: January 17, 1974
    Date of Patent: January 3, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Martin R. Cines, Ben B. Buchanan