Patents by Inventor Darrell W. Clinton

Darrell W. Clinton 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).

  • Method for removal of coal tar based contaminants from waste waters
    Patent number: 4729832
    Abstract: The invention relates to a method for substantially reducing the concentration of coal tar based contaminants in waste water streams. The method comprises first forming an intimate mixture of the waste water stream to be treated with at least one coal tar based extractant. The intimate mixture then is subjected to an extraction temperature sufficient to reduce the concentration of the contaminant in the waste water stream to its equilibrium concentration as the extraction temperature employed. Finally, the mixture is separated and a treated waste water stream recovered which is characterized by a substantially reduced and constant concentration of the contaminants and a substantially reduced biological demand.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: March 8, 1988
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Robert E. Leonard, Darrell W. Clinton