Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828684 | Hydrogen production and catalyst demetallization process | — | 1989-05-09 |
| 4824814 | Catalyst treatment and process for using treated catalyst | Jin S. Yoo | 1989-04-25 |
| 4806512 | Virgin catalyst treatment | — | 1989-02-21 |
| 4800185 | Regeneraation of metal contaminated hydrocarbon conversion catalytsts | Jan Otterstedt, Jin S. Yoo | 1989-01-24 |