Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869742 | Air separation process with waste recycle for nitrogen and oxygen production | Robert M. Thorogood | 1989-09-26 |
| 4867773 | Cryogenic process for nitrogen production with oxygen-enriched recycle | Robert M. Thorogood, Jeffrey A. Hopkins | 1989-09-19 |
| 4848996 | Nitrogen generator with waste distillation and recycle of waste distillation overhead | Robert M. Thorogood | 1989-07-18 |
| 4836833 | Production and recovery of hydrogen and carbon monoxide | David M. Nicholas, Stephen P. Goff, Joseph P. Bushinsky | 1989-06-06 |