F25J 2250/52
One fluid being oxygen enriched compared to air
Official title: One fluid being oxygen enriched compared to air, e.g. "crude oxygen"
F25J2250/52 (One fluid being oxygen enriched compared to air) appears on 58 US grants and 27 published applications in this corpus.
Search patents in F25J- Granted patents
- 58
- Published applications
- 27
- Assignees
- 11
- Inventors
- 72
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 8 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 2 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 3 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 4 |
| 2022 | 1 | 4 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air separation unit and air separation method25 Aug 2026US 12,716,651 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for improved recovery of argon12 Aug 2025US 12,385,692 B2Air Products and Chemicals, Inc.
- Air separation device and air separation method22 Oct 2024US 12,123,647 B2Taiyo Nippon Sanso Corporation
- System and method for flexible recovery of argon from a cryogenic air separation unit1 Mar 2022US 11,262,125 B2Praxair Technology, Inc.
- System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit26 May 2020US 10,663,224 B2Praxair Technology, Inc.
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- Process and Apparatus for Improved Recovery of Argon18 Apr 2024US 2024/0125550 A1Air Products and Chemicals, Inc.
- Air separation unit and air separation method15 Feb 2024US 2024/0053097 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation device and air separation method11 Aug 2022US 2022/0252344 A1Taiyo Nippon Sanso Corporation
- Process and device for vaporizing purge liquid from a cryogenic liquid vaporizer26 May 2022US 2022/0163432 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Air separation process and system utilizing pressure-swing driers95US 3,967,464 AAir Products and Chemicals, Inc. · 1976
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999
- Air separation process for the production of oxygen-rich and nitrogen-rich products34US 4,936,099 AAir Products and Chemicals, Inc. · 1990
- Method of purifying argon through cryogenic adsorption29US 5,159,816 AAir Products and Chemicals, Inc. · 1992
- Liquefied gases using an air recycle liquefier26US 4,715,873 AAir Products and Chemicals, Inc. · 1987