Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6288289 | Integrated effluent treatment process for nitroaromatic manufacture | David A. Boyd, Alfred A. Guenkel | 2001-09-11 |
| 5890531 | Apparatus for the self-cleaning of process tubes | John Joustra | 1999-04-06 |
| 5470481 | Method and apparatus for recovering wash water from pulp and paper mill effluent | Michael Modell, Edward G. Hauptmann | 1995-11-28 |