Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880604 | Apparatus for coke burning in regeneration of hydrocarbon conversion catalyst | — | 1989-11-14 |
| 4859643 | Regeneration method with reduced catalyst heat exposure | Paul A. Sechrist | 1989-08-22 |