Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660500 | Enhanced deep soil vapor extraction process and apparatus utilizing sheet metal pilings | Arnold R. Marsden, Jr., David Weingaertner, Lynton W. R. Dicks, Paul C. Johnson | 1997-08-26 |
| 5271693 | Enhanced deep soil vapor extraction process and apparatus for removing contaminants trapped in or below the water table | Paul C. Johnson, David Weingaertner, Lynton W. R. Dicks, Arnold R. Marsden, Jr. | 1993-12-21 |
| 5221827 | Heater blanket for in-situ soil heating | Arnold R. Marsden, Jr., David Weingaertner, Paul C. Johnson, Lynton W. R. Dicks, Harvey B. Wilde | 1993-06-22 |
| 5114497 | Soil decontamination | Paul C. Johnson, James D. Colthart, David Weingaertner, Charles C. Chou, Dallas Lea Byers +3 more | 1992-05-19 |
| 5076727 | In situ decontamination of spills and landfills by focussed microwave/radio frequency heating and a closed-loop vapor flushing and vacuum recovery system | Paul C. Johnson, Charles C. Chou | 1991-12-31 |