Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223638 | Preparation of urethane and carbonate products | Barry L. Parnas, Dennis P. Riley, John J. Talley | 1993-06-29 |
| 5200547 | Preparation of urethane and carbonate products | Dennis P. Riley | 1993-04-06 |
| 5189205 | Process for preparing isocyanates | Thomas E. Waldman | 1993-02-23 |
| 5055577 | Preparation of urethane products | Dennis P. Riley | 1991-10-08 |