Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5641413 | Removal of nitrogen from wastewaters | William M. Copa | 1997-06-24 |
| 5460732 | Method of monitoring pH in caustic liquor wet oxidation | — | 1995-10-24 |
| 5298174 | Low temperature caustic sulfide wet oxidation process | David A. Beula, William M. Copa | 1994-03-29 |
| 5192453 | Wet oxidation process for ACN waste streams | Kenneth P. Keckler, Bruce L. Brandenburg, Richard W. Lehmann | 1993-03-09 |
| 5082571 | Caustic sulfide wet oxidation process | David A. Beula, William M. Copa | 1992-01-21 |