Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5277847 | Method and apparatus for catalyst-downcomer-tray operation | Joseph C. Gentry | 1994-01-11 |
| 5277848 | Method and apparatus for downcomer tray operation | John T. Thorngren | 1994-01-11 |