Patents Assigned to SDVC, Inc.
  • Method for removing a substance from a medium
    Patent number: 5391020
    Abstract: A method for removing a substance from a medium including the steps of growing plant life in the medium to absorb the substance into the plant life, removing the plant life from the medium and thereby the substance from the medium and repeating the growing and removing steps as many times as necessary to reduce the remaining quantity of the substance in the medium to the level desired.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: February 21, 1995
    Assignee: SDVC, Inc.
    Inventor: John B. Williamson