F25J 3/04636
Using a hybrid air separation unit
Official title: {using a hybrid air separation unit, e.g. combined process by cryogenic separation and non-cryogenic separation techniques (F25J3/04733 and F25J3/04757 take precedence)}
F25J3/04636 (Using a hybrid air separation unit) appears on 61 US grants and 46 published applications in this corpus.
Search patents in F25J- Granted patents
- 61
- Published applications
- 46
- Assignees
- 39
- Inventors
- 173
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
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| 1979 | 1 | 0 |
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| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
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| 2016 | 0 | 1 |
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| 2018 | 0 | 2 |
| 2019 | 0 | 5 |
| 2020 | 1 | 3 |
| 2021 | 2 | 5 |
| 2022 | 3 | 3 |
| 2023 | 2 | 6 |
| 2024 | 2 | 3 |
| 2025 | 7 | 2 |
| 2026 | 2 | 2 |
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
- Integrated ammonia and sulfuric acid production plant and process20 Jan 2026US 12,528,752 B2Chemetics Inc.
- Device and method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water16 Dec 2025US 12,497,705 B2Hangzhou Oxygen Plant Group Co., Ltd.
- Cryogenic cooling system for an aircraft15 Jul 2025US 12,358,630 B2Rtx Corporation
- Cryogenic cooling system for an aircraft8 Jul 2025US 12,351,318 B2Rtx Corporation
- Adsorption-membrane-distillation direct air capture systems and methods24 Sep 2026US 2026/0284587 A1Georgia Tech Research Corporation
- Hydrocarbon production system and hydrocarbon production method23 Jul 2026US 2026/0209141 A1Mitsubishi Heavy Industries, Ltd.
- Magnetic Systems And Methods For Oxygen Separation And Purification From Fluids11 Sep 2025US 2025/0281934 A1Zeine, Inc.
- Process and plant for providing a nitrogen product, an oxygen product and a hydrogen product28 Aug 2025US 2025/0271208 A1Linde Aktiengesellschaft
- Ultra-high-purity oxygen production method and ultra-high-purity oxygen production apparatus24 Oct 2024US 2024/0353173 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- Apparatus for producing nitrogen104US 4,792,502 AInternational Fuel Cells Corporation · 1988
- Liquid oxygen production77US 6,212,904 B1In-X Corporation · 2001
- Compact small volume liquid oxygen production system60US 5,893,275 AIn-X Corporation · 1999
- Process for the generation of gaseous and/or liquid nitrogen49US 4,595,405 AAir Products and Chemicals, Inc. · 1986