Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7037423 | Method for removal and detoxication of dissolved metals in a rainwater discharge | Joseph Bartosh, Zachary J. Lezoche, Richard T. Sewald, Sr. | 2006-05-02 |
| 5989435 | Method for magnetically filtering wastewaters containing oil-coated mill scale | Robert L. Greenawalt, Richard W. Faupel | 1999-11-23 |
| 5792364 | Wastewater treatment process for vacuum degasser effluent | Robert L. Greenawalt | 1998-08-11 |
| 5766450 | Apparatus for magnetically filtering wastewaters containing oil-coated mill scale | Robert L. Greenawalt, Richard W. Faupel | 1998-06-16 |
| 5192418 | Metal recovery method and system for electroplating wastes | Charles R. Hughes, Richard N. Steinbicker | 1993-03-09 |
| 4606829 | Removal of complexed zinc-cyanide from wastewater with improved sludge stability | Michael Rice | 1986-08-19 |
| 4543189 | Removal of complexed zinc-cyanide from wastewater | Michael Rice | 1985-09-24 |
| 4465597 | Treatment of industrial wastewaters | James B. Pfeiffer, Richard T. Sewald, Sr., Charles J. Sterner | 1984-08-14 |
| 4256468 | Method for cleaning sinter plant gas emissions | Marshall R. Mazer, Steven A. Jassund | 1981-03-17 |