Patents by Inventor Xiandong Feng

Xiandong Feng 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).

  • Remediation of arsenic-contaminated soils and groundwaters
    Patent number: 5769961
    Abstract: An in situ method for extraction of arsenic contaminants from a soil medium and remediation of the medium including contacting the medium with an extractant solution, directing the solution within and through the medium, and collecting the solution and contaminants. The method can also be used for arsenate and/or arsenite removal.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: June 23, 1998
    Assignee: The University of Chicago
    Inventors: Robert W. Peters, James R. Frank, Xiandong Feng