F25J 3/04436
Using at least a triple pressure main column system
Official title: {using at least a triple pressure main column system (F25J3/0446, F25J3/04624, F25J3/04636 and F25J3/04715 take precedence)}
F25J3/04436 (Using at least a triple pressure main column system) appears on 118 US grants and 71 published applications in this corpus.
Search patents in F25J- Granted patents
- 118
- Published applications
- 71
- Assignees
- 27
- Inventors
- 111
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
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| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 12 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 13 | 1 |
| 2002 | 5 | 5 |
| 2003 | 6 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 3 |
| 2009 | 2 | 3 |
| 2010 | 1 | 2 |
| 2011 | 1 | 5 |
| 2012 | 1 | 2 |
| 2013 | 3 | 6 |
| 2014 | 1 | 5 |
| 2015 | 3 | 2 |
| 2016 | 1 | 6 |
| 2017 | 3 | 4 |
| 2018 | 3 | 2 |
| 2019 | 6 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 4 |
| 2022 | 0 | 3 |
| 2023 | 2 | 3 |
| 2024 | 6 | 5 |
| 2025 | 5 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Process and plant for low-temperature separation of air9 Dec 2025US 12,492,863 B2Linde Aktiengesellschaft
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column8 Jul 2025US 12,352,496 B2Praxair Technology, Inc.
- Carbon-based oxygen-enriched combustion method for recirculation of flue gas from cement kiln24 Jun 2025US 12,339,062 B2Hangzhou Turning Energy Technology Development Co., Ltd.
- System and method for cryogenic air separation using four distillation columns including an intermediate pressure column28 Jan 2025US 12,209,802 B2Praxair Technology, Inc.
- Method and apparatus for obtaining pressurized nitrogen by cryogenic separation of air14 Jan 2025US 12,196,485 B2Linde Aktiengesellschaft
- Apparatus and process for providing nitrogen and oxygen18 Sep 2025US 2025/0290692 A1Air Products and Chemicals, Inc.
- High-purity oxygen production method, and air separation device for producing high-purity oxygen12 Jun 2025US 2025/0189218 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Effective use of cryogenic separation section in syngas manufacture23 Jan 2025US 2025/0026639 A1Topsoe A/S
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column1 Feb 2024US 2024/0035740 A1Praxair Technology, Inc.
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column1 Feb 2024US 2024/0035741 A1Praxair Technology, Inc.
Most cited
By later US patents
- Integrated apparatus for generating power and/or oxygen enriched fluid and process for the operation thereof91US 6,202,442 B1L'Air Liquide Societe Anonyme Pour l'Etude et l'Expoitation des Procedes Georges Claude · 2001
- Integrated apparatus for generating power and/or oxygen enriched fluid, process for the operation thereof82US 6,276,171 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Triple column distillation system for oxygen and pressurized nitrogen production46US 5,341,646 AAir Products and Chemicals, Inc. · 1994
- Cryogenic air separation with cold argon recycle38US 4,533,375 A1985
- Production of ultra-high purity oxygen from cryogenic air separation plants31US 5,049,173 AAir Products and Chemicals, Inc. · 1991