Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867862 | Process for hydrodehazing hydrocracked lube oil base stocks | — | 1989-09-19 |
| 4822476 | Process for hydrodewaxing hydrocracked lube oil base stocks | Paul M. Spindler | 1989-04-18 |