Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699671 | Downflow shell and tube reboiler-condenser heat exchanger for cryogenic rectification | Vijayaraghavan Srinivasan | 1997-12-23 |
| 5700403 | Distillation column employing structured packing which reduces wall flow | John Fredric Billingham | 1997-12-23 |
| 5669236 | Cryogenic rectification system for producing low purity oxygen and high purity oxygen | John Fredric Billingham, Dante Patrick Bonaquist | 1997-09-23 |
| 5632934 | Packing with improved capacity for rectification systems | John Fredric Billingham | 1997-05-27 |