Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831002 | Cr-promoted hydrotreating catalysts | Teh C. Ho, Larry E. McCandlish, Archie R. Young | 1989-05-16 |
| 4797200 | Upgrading heavy oils by solvent dissolution and ultrafiltration | — | 1989-01-10 |