Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876228 | Zeolite modifications | Clarence D. Chang, Cynthia T-W. Chu, Pochen Chu, Ralph M. Dessau, William E. Garwood +2 more | 1989-10-24 |
| 4876411 | Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index | Emmerson Bowes, Clarence D. Chang, Scott Han | 1989-10-24 |
| 4851604 | Toluene disproportionation | Robert P. L. Absil, Scott Han, David O. Marler | 1989-07-25 |