Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836836 | Separating argon/oxygen mixtures using a structured packing | Douglas L. Bennett, George S. Witmer, Charles M. Woods | 1989-06-06 |
| 4813988 | Suitable distillation column packing for the cryogenic separation of air | Douglas L. Bennett, Andrew J. Patrylak, John S. Zabrenski | 1989-03-21 |