Issued Patents All Time
Showing 1–7 of 7 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, Arthur L. Otermat, Paul C. Johnson | 1997-08-26 |
| 5364421 | Coal blends having improved ash viscosity | Timothy S. Westby, Thomas G. McCord | 1994-11-15 |
| 5271693 | Enhanced deep soil vapor extraction process and apparatus for removing contaminants trapped in or below the water table | Paul C. Johnson, David Weingaertner, Arthur L. Otermat, Arnold R. Marsden, Jr. | 1993-12-21 |
| 5233164 | Modified heater for in situ soil heating | Paul C. Johnson, Arnold R. Marsden, Jr., David Weingaertner | 1993-08-03 |
| 5221827 | Heater blanket for in-situ soil heating | Arnold R. Marsden, Jr., Arthur L. Otermat, David Weingaertner, Paul C. Johnson, Harvey B. Wilde | 1993-06-22 |
| 4872345 | Measuring wall erosion | — | 1989-10-10 |
| 4595297 | Method and apparatus for measure of heat flux through a heat exchange tube | Chih-Hsiung Liu | 1986-06-17 |