Patents by Inventor Ronald J. Griffith

Ronald J. Griffith 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).

  • Electric field method and apparatus for decontaminating soil
    Patent number: 6228247
    Abstract: Disclosed is an electrokinetic soil decontamination system that uses special electrode wall configurations, treatment wall configurations, and a combination electrode/treatment wall. A special emplacement method for all the flowable wall materials is used and special wall material compositions are disclosed.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: May 8, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ronald J. Griffith, Richard Claude Landis, Dale Steven Schultz
  • Electric field method and apparatus for decontaminating soil
    Patent number: 5914020
    Abstract: Disclosed is an electrokinetic soil decontamination system that uses special electrode wall configurations, treatment wall configurations, and a combination electrode/treatment wall. A special emplacement method for all the flowable wall materials is used and special wall material compositions are disclosed.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: June 22, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ronald J. Griffith, Richard Claude Landis, Dale Steven Schultz
  • Electric field method and apparatus for decontaminating soil
    Patent number: 5584980
    Abstract: Disclosed is an electrokinetic soil decontamination method using closely spaced like electrode assemblies, special panel electrode configurations, an electrode emplacement process which leaves the soil in-situ, and a purge fluid conditioning and circulation process that results in reduced costs for soil decontamination. Panel electrode assemblies, tubular electrode assemblies and treatment panel assemblies are also disclosed.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: December 17, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ronald J. Griffith, Richard C. Landis, Dale S. Schultz, Stephen H. Shoemaker