Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6568208 | System and method for introducing low pressure reflux to a high pressure column without a pump | Paul Higginbotham | 2003-05-27 |
| 6457327 | Process for concentrating fluorine compounds | John Frederick Cirucci, Rakesh Agrawal, Timothy Edward Conway | 2002-10-01 |
| 6276168 | Purification of nitrogen trifluoride by continuous cryogenic distillation | John Frederick Cirucci, Rakesh Agrawal, Shyam Ramchand Suchdeo, Steven R. Auvil | 2001-08-21 |
| 6164089 | Method and apparatus for recovering xenon or a mixture of krypton and xenon from air | William Paul Sweeny | 2000-12-26 |
| 6116051 | Distillation process to separate mixtures containing three or more components | Rakesh Agrawal | 2000-09-12 |
| 6106674 | Operable and efficient distillation schemes for multicomponent separations | Rakesh Agrawal | 2000-08-22 |
| 6009723 | Elevated pressure air separation process with use of waste expansion for compression of a process stream | Donn Michael Herron | 2000-01-04 |
| 5970742 | Distillation schemes for multicomponent separations | Rakesh Agrawal | 1999-10-26 |
| 5953936 | Distillation process to separate mixtures containing three or more components | Rakesh Agrawal | 1999-09-21 |
| 5934104 | Multiple column nitrogen generators with oxygen coproduction | Donn Michael Herron, Jeffrey A. Hopkins | 1999-08-10 |
| 5706674 | Argon recovery from silicon crystal furnace | Thomas Hsiao-Ling Hsiung, Rakesh Agrawal | 1998-01-13 |
| 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 |