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, Guenter H. Kuehl +2 more | 1989-10-24 |
| 4814543 | Nitrogen resistant paraffin hydroisomerization catalysts | Nai Y. Chen, Sharon B. McCullen | 1989-03-21 |
| 4810357 | Catalytic dewaxing of light and heavy oils in dual parallel reactors | Arthur W. Chester, James C. Vartuli | 1989-03-07 |