Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5925238 | Catalytic multi-stage hydrodesulfurization of metals-containing petroleum residua with cascading of rejuvenated catalyst | John E. Duddy, Lawrence M. Abrams | 1999-07-20 |
| 5906953 | Catalyst rejuvenation process | John E. Duddy, Lawrence M. Abrams | 1999-05-25 |
| 4444665 | Treated mineral and method for purifying liquids therewith | — | 1984-04-24 |
| 4386010 | Treated attapulgite clay composition | — | 1983-05-31 |