F25J 3/04369
Of argon or argon enriched stream
Official title: {of argon or argon enriched stream}
F25J3/04369 (Of argon or argon enriched stream) appears on 8 US grants and 0 published applications in this corpus.
Search patents in F25J- Granted patents
- 8
- Published applications
- 0
- Assignees
- 5
- Inventors
- 8
- Latest grant
- 26 Oct 1993
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dual heat pump cycles for increased argon recovery26 Oct 1993US 5,255,524 AAir Products and Chemicals, Inc.
- Process and apparatus for air fractionation by rectification12 Oct 1993US 5,251,449 ALinde Aktiengesellschaft
- Cryogenic rectification system with argon heat pump20 Jul 1993US 5,228,296 APraxair Technology, Inc.
- Production of oxygen-lean argon from air19 Feb 1991US 4,994,098 AAir Products and Chemicals, Inc.
- Cryogenic triple-pressure air separation with LP-to-MP latent-heat-exchange12 Aug 1986US 4,605,427 A
No published applications in this class yet.
Most cited
By later US patents
- Cryogenic air separation with cold argon recycle38US 4,533,375 A1985
- Process for recovering argon30US 4,575,388 ANihon Sanso Kabushiki Kaisha · 1986
- Cryogenic triple-pressure air separation with LP-to-MP latent-heat-exchange20US 4,605,427 A1986
- Process and apparatus for air fractionation by rectification15US 5,251,449 ALinde Aktiengesellschaft · 1993
- Dual heat pump cycles for increased argon recovery15US 5,255,524 AAir Products and Chemicals, Inc. · 1993