Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876411 | Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index | Emmerson Bowes, Scott Han, David S. Shihabi | 1989-10-24 |
| 4876228 | Zeolite modifications | Cynthia T-W. Chu, Pochen Chu, Ralph M. Dessau, William E. Garwood, Guenter H. Kuehl +2 more | 1989-10-24 |
| 4871702 | Ammonium activation of zeolites in the presence of gaseous ammonia | Cynthia T-W. Chu, Carol S. Lee, Randall D. Partridge | 1989-10-03 |
| 4870192 | Production of lactones and omega-hydroxycarboxylic acids | Stuart D. Hellring | 1989-09-26 |
| 4855431 | Process for making alkyl pyrazines | Patrick D. Perkins | 1989-08-08 |
| 4846853 | Layered divalent metal hydrogen phosphates | Stuart D. Hellring | 1989-07-11 |
| 4837398 | Ammonium activation of zeolites in the presence of gaseous ammonia | Cynthia T-W. Chu, Carol S. Lee | 1989-06-06 |