Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592834 | Process and installation for the separation of air | Bernard Darredeau, Jean-Yves Lehman | 1997-01-14 |
| 5505051 | Process for restarting an auxilliary column for argon/oxygen separation by distillation and corresponding installation | Bernard Darredeau | 1996-04-09 |
| 5437160 | Process and installation for the separation of air | Bernard Darredeau, Jean-Yves Lehman | 1995-08-01 |