F25J 2215/52
Oxygen production with multiple purity o2
Official title: Oxygen production with multiple purity O2
F25J2215/52 (Oxygen production with multiple purity o2) appears on 46 US grants and 17 published applications in this corpus.
Search patents in F25J- Granted patents
- 46
- Published applications
- 17
- Assignees
- 11
- Inventors
- 71
- Latest grant
- 30 Dec 2025
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 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants30 Dec 2025US 12,510,294 B2Linde Aktiengesellschaft
- Method and unit for low-temperature air separation19 Dec 2023US 11,846,468 B2Linde Aktiengesellschaft
- Method for obtaining an air product in an air separation plant and air separation plant19 Feb 2019US 10,209,004 B2Linde Aktiengesellschaft
- Method and apparatus for separating air by cryogenic distillation4 Jul 2017US 9,696,087 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Rare gases recovery process for triple column oxygen plant17 Mar 2015US 8,978,413 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for production of ultra-high purity oxygen5 Feb 2026US 2026/0035243 A1
- Air separation unit14 Aug 2025US 2025/0257941 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for the low-temperature separation of air and air separation plant28 Nov 2024US 2024/0393043 A1Linde Aktiengesellschaft
- Process and apparatus for cryogenic separation of air with mixed gas turbine9 Nov 2023US 2023/0358468 A1Linde Aktiengesellschaft
- Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants1 Jun 2023US 2023/0168030 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999
- Thermal cycle for the compression of a fluid by the expansion of another fluid25US 4,022,030 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1977
- Process and apparatus for air separation by rectification24US 4,824,453 ALinde Aktiengesellschaft · 1989
- Split column multiple condenser-reboiler air separation process23US 4,448,595 AUnion Carbide Corporation · 1984
- Cryogenic air separation blast furnace system21US 5,582,036 APraxair Technology, Inc. · 1996