Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871382 | Air separation process using packed columns for oxygen and argon recovery | Douglas L. Bennett, Rodney John Allam, Alan L. Prentice, Bruce K. Dawson | 1989-10-03 |
| 4869742 | Air separation process with waste recycle for nitrogen and oxygen production | Thomas M. Roden | 1989-09-26 |
| 4869883 | Inert gas purifier for bulk nitrogen without the use of hydrogen or other reducing gases | William T. Kleinberg | 1989-09-26 |
| 4867773 | Cryogenic process for nitrogen production with oxygen-enriched recycle | Thomas M. Roden, Jeffrey A. Hopkins | 1989-09-19 |
| 4848996 | Nitrogen generator with waste distillation and recycle of waste distillation overhead | Thomas M. Roden | 1989-07-18 |