Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876411 | Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index | Clarence D. Chang, Scott Han, David S. Shihabi | 1989-10-24 |
| 4872968 | Catalytic dewaxing process using binder-free catalyst | — | 1989-10-10 |
| 4861894 | Pyridine and alkylpyridine synthesis using a crystalline silicate catalyst having the ZSM-5 structure | Tsoung Y. Yan | 1989-08-29 |