Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871382 | Air separation process using packed columns for oxygen and argon recovery | Robert M. Thorogood, Douglas L. Bennett, Alan L. Prentice, Bruce K. Dawson | 1989-10-03 |
| 4842625 | Control method to maximize argon recovery from cryogenic air separation units | Alan L. Prentice | 1989-06-27 |