Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5599440 | Catalyst method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Bruce E. Stangeland, David C. Kramer, James T. McCall, Georgieanna L. Scheuerman, Robert W. Bachtel +1 more | 1997-02-04 |