Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5261947 | Process for the production of a gas having a substantial oxygen content | Leon Hay | 1993-11-16 |
| 5232479 | Adsorber comprising annular superposed beds of adsorbent materials | Michel Poteau | 1993-08-03 |
| 5223004 | Method for producing oxygen by adsorption separation from air | Leon Hay, Thomas Rottner | 1993-06-29 |
| 5078757 | Process for the production of gaseous oxygen under pressure | Thomas Rottner, Leon Hay | 1992-01-07 |