Issued Patents All Time
Showing 201–225 of 244 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5205127 | Cryogenic process for producing ultra high purity nitrogen | — | 1993-04-27 |
| 5167125 | Recovery of dissolved light gases from a liquid stream | — | 1992-12-01 |
| 5165245 | Elevated pressure air separation cycles with liquid production | Jianguo Xu | 1992-11-24 |
| 5159816 | Method of purifying argon through cryogenic adsorption | Kenneth William Kovak, Janice C. Peterson | 1992-11-03 |
| 5141543 | Use of liquefied natural gas (LNG) coupled with a cold expander to produce liquid nitrogen | Thomas E. Cormier | 1992-08-25 |
| 5139547 | Production of liquid nitrogen using liquefied natural gas as sole refrigerant | Calvin L. Ayres | 1992-08-18 |
| 5137559 | Production of nitrogen free of light impurities | — | 1992-08-11 |
| 5137558 | Liquefied natural gas refrigeration transfer to a cryogenics air separation unit using high presure nitrogen stream | — | 1992-08-11 |
| 5129932 | Cryogenic process for the separation of air to produce moderate pressure nitrogen | Donald W. Woodward | 1992-07-14 |
| 5123947 | Cryogenic process for the separation of air to produce ultra high purity nitrogen | — | 1992-06-23 |
| 5122173 | Cryogenic production of krypton and xenon from air | Brian E. Farrell | 1992-06-16 |
| 5114449 | Enhanced recovery of argon from cryogenic air separation cycles | Donald W. Woodward | 1992-05-19 |
| 5077978 | Cryogenic process for the separation of air to produce moderate pressure nitrogen | Donald W. Woodward | 1992-01-07 |
| 5069699 | Triple distillation column nitrogen generator with plural reboiler/condensers | — | 1991-12-03 |
| 5067976 | Cryogenic process for the production of an oxygen-free and methane-free, krypton/xenon product | Brian E. Farrell, Keith Wilson | 1991-11-26 |
| 5063746 | Cryogenic process for the production of methane-free, krypton/xenon product | Brian E. Farrell | 1991-11-12 |
| 5049173 | Production of ultra-high purity oxygen from cryogenic air separation plants | Thomas E. Cormier, Alan L. Prentice, Donald W. Woodward | 1991-09-17 |
| 5026912 | Alkylation of aromatic amines over thermally pretreated zeolites | Steven R. Auvil | 1991-06-25 |
| 5006139 | Cryogenic air separation process for the production of nitrogen | Donald W. Woodward | 1991-04-09 |
| 5006137 | Nitrogen generator with dual reboiler/condensers in the low pressure distillation column | Donald W. Woodward | 1991-04-09 |
| 4994098 | Production of oxygen-lean argon from air | Donald W. Woodward | 1991-02-19 |
| 4983194 | Production of high purity argon | Jeffrey A. Hopkins, Roger M. McGuinness, Steven L. Feldman | 1991-01-08 |
| 4947649 | Cryogenic process for producing low-purity oxygen | Steven R. Auvil | 1990-08-14 |
| 4936099 | Air separation process for the production of oxygen-rich and nitrogen-rich products | Donald W. Woodward | 1990-06-26 |
| 4930072 | Method for computing transitive closure | Hosagrahar Visvesvaraya Jagadish | 1990-05-29 |