Patents by Inventor Joseph L. Hedrick

Joseph L. Hedrick 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).

  • Supercritical fluid extraction from liquids
    Patent number: 5116508
    Abstract: A method and apparatus are disclosed for the supercritical extraction of a sample from a liquid medium. The method and apparatus provide for the recirculation of the supercritical fluid containing the sample through the liquid containing sample until at least a portion of the sample has been extracted.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: May 26, 1992
    Assignee: Suprex Corp.
    Inventors: M. Lalith Kumar, Joseph L. Hedrick