Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861747 | Catalysts comprising ruthenium on titania surface modified with group VA oxide of vanadium, niobium or tantalum | Darchun B. Yang | 1989-08-29 |
| 4855457 | Carboxylic anhydride process | Saleh Y. Ramzi | 1989-08-08 |
| 4835126 | Process for preparing a catalyst for the preparation of a carboxylic anhydride | Ramzi Y. Saleh | 1989-05-30 |
| 4831164 | Process of preparing carboxylic anhydride | Ramzi Y. Saleh | 1989-05-16 |
| 4814317 | Process for preparing catalysts for preparation of aromatic carboxylic anhydrides | Ramzi Y. Saleh | 1989-03-21 |