F25J 2230/52
The fluid being oxygen enriched compared to air
Official title: the fluid being oxygen enriched compared to air, e.g. "crude oxygen"
F25J2230/52 (The fluid being oxygen enriched compared to air) appears on 24 US grants and 23 published applications in this corpus.
Search patents in F25J- Granted patents
- 24
- Published applications
- 23
- Assignees
- 10
- Inventors
- 45
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 5 |
| 2020 | 4 | 2 |
| 2021 | 1 | 5 |
| 2022 | 0 | 1 |
| 2023 | 2 | 4 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Nitrogen generating device and nitrogen generating method31 Mar 2026US 12,590,758 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit11 Mar 2025US 12,247,783 B2Linde Aktiengesellschaft
- Method and apparatus for obtaining pressurized nitrogen by cryogenic separation of air14 Jan 2025US 12,196,485 B2Linde Aktiengesellschaft
- Method and unit for low-temperature air separation19 Dec 2023US 11,846,468 B2Linde Aktiengesellschaft
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit18 Apr 2023US 11,629,913 B2Praxair Technology, Inc.
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- Nitrogen generating device and nitrogen generating method20 Feb 2025US 2025/0060158 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Nitrogen generating device and nitrogen generating method26 Oct 2023US 2023/0341181 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit13 Jul 2023US 2023/0221069 A1Linde Aktiengesellschaft
- Nitrogen and argon producing air separation unit23 Feb 2023US 2023/0055084 A1
Most cited
By later US patents
- Process for the generation of gaseous and/or liquid nitrogen49US 4,595,405 AAir Products and Chemicals, Inc. · 1986
- Process and apparatus for air fractionation by rectification20US 5,036,672 ALinde Aktiengesellschaft · 1991
- Air separation with argon recovery16US 5,034,043 ALinde Aktiengesellschaft · 1991
- Hybrid membrane - cryogenic generation of argon concurrently with nitrogen10US 5,049,174 AAir Products and Chemicals, Inc. · 1991
- System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit9US 10,663,222 B2Praxair Technology, Inc. · 2020