Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884531 | Operation of an internal combustion engine with a pre-engine reformer | Ralph M. Dessau | 1989-12-05 |
| 4882039 | Catalytic cracking of hydrocarbons with oxygen promoted alkali metal zeolite cracking catalyst | Nai Y. Chen | 1989-11-21 |
| 4869806 | Production of high viscosity index lubricating oil stock | Roger A. Morrison, Ernest W. Valyocsik | 1989-09-26 |
| 4863885 | Method for increasing the hydrocarbon sorption capacity of a zeolite | — | 1989-09-05 |
| 4861932 | Aromatization process | Nai Y. Chen, Sharon B. McCullen | 1989-08-29 |
| 4853104 | Process for catalytic conversion of lube oil bas stocks | Philip Varghese | 1989-08-01 |
| 4834869 | Resid upgrading process | Philip J. Angevine, Pochen Chu, Garry W. Kirker | 1989-05-30 |
| 4812228 | Process for hydrotreating residual petroleum oil | Philip J. Angevine, Michael E. Landis | 1989-03-14 |
| 4803186 | Shape selective crystalline silicate zeolite containing intermetallic component and use as catalyst in hydrocarbon conversions | Nai Y. Chen, Paul B. Weisz | 1989-02-07 |