Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5701764 | Process to produce moderate purity oxygen using a double column plus an auxiliary low pressure column | Rakesh Agrawal, Donn Michael Herron | 1997-12-30 |
| 5697229 | Process to produce nitrogen using a double column plus an auxiliary low pressure separation zone | Rakesh Agrawal | 1997-12-16 |
| 5682762 | Process to produce high pressure nitrogen using a high pressure column and one or more lower pressure columns | Rakesh Agrawal | 1997-11-04 |
| 5682763 | Ultra high purity oxygen distillation unit integrated with ultra high purity nitrogen purifier | Rakesh Agrawal, Lawrence Walter Pruneski | 1997-11-04 |
| 5682764 | Three column cryogenic cycle for the production of impure oxygen and pure nitrogen | Rakesh Agrawal | 1997-11-04 |
| 5678425 | Method and apparatus for producing liquid products from air in various proportions | Rakesh Agrawal, Shyam Ramchand Suchdeo | 1997-10-21 |