Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885079 | Process for separating organic material from particulate solids | Stephen C. Paspek, Richard B. Stalzer | 1989-12-05 |
| 4842715 | Novel technique for rendering oily sludges environmentally acceptable | Stephen C. Paspek, Jeffrey B. Hauser, Richard B. Stalzer | 1989-06-27 |
| 4824555 | Extraction of oil from stable oil-water emulsions | Stephen C. Paspek | 1989-04-25 |