F25J 2235/52
The fluid being oxygen enriched compared to air
Official title: the fluid being oxygen enriched compared to air ("crude oxygen")
F25J2235/52 (The fluid being oxygen enriched compared to air) appears on 28 US grants and 21 published applications in this corpus.
Search patents in F25J- Granted patents
- 28
- Published applications
- 21
- Assignees
- 6
- Inventors
- 58
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 3 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 2 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
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
- Cryogenic air separation unit with argon condenser vapor recycle19 Mar 2024US 11,933,541 B2Praxair Technology, Inc.
- Method and unit for low-temperature air separation19 Dec 2023US 11,846,468 B2Linde Aktiengesellschaft
- Air separation plant, method for obtaining a product containing argon, and method for creating an air separation plant17 Mar 2020US 10,591,209 B2Linde Aktiengesellschaft
- Method and device for the cryogenic decomposition of air15 Oct 2019US 10,443,931 B2Linde Aktiengesellschaft
- 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
- Cryogenic air separation unit with argon condenser vapor recycle16 Feb 2023US 2023/0050296 A1Praxair Technology, Inc.
- Method and apparatus for producing product nitrogen gas and product argon13 Oct 2022US 2022/0325952 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and plant for low-temperature fractionation of air18 Aug 2022US 2022/0260312 A1Linde Aktiengesellschaft
- Method and unit for low-temperature air separation9 Dec 2021US 2021/0381761 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Air separation process for the production of oxygen-rich and nitrogen-rich products34US 4,936,099 AAir Products and Chemicals, Inc. · 1990
- Cryogenic rectification system for producing elevated pressure nitrogen20US 5,402,647 APraxair Technology, Inc. · 1995
- Air separation17US 5,438,835 AThe BOC Group, Inc. · 1995
- Air separation10US 4,747,860 AThe BOC Group, Inc. · 1988
- Air distillation process and plant10US 4,818,262 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1989