F25J 2270/20
Quasi-closed internal or closed external hydrogen refrigeration cycle
F25J2270/20 (Quasi-closed internal or closed external hydrogen refrigeration cycle) appears on 7 US grants and 15 published applications in this corpus.
Search patents in F25J- Granted patents
- 7
- Published applications
- 15
- Assignees
- 10
- Inventors
- 29
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 4 |
| 2024 | 0 | 2 |
| 2025 | 0 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cryogenic gas cooling system and method16 Jun 2026US 12,656,057 B2Chart Energy & Chemicals, Inc.
- Hydrogen liquefaction with stored hydrogen refrigeration source9 Jun 2026US 12,650,259 B2Chart Energy & Chemicals, Inc.
- Method of hydrogen liquefaction using optimized claude refrigeration cycles6 Jan 2026US 12,516,877 B2Evergreen Cryogenics Inc.
- Method and system for liquifying a gas27 Dec 2022US 11,536,511 B2
- Ethane recovery and ethane rejection methods and configurations22 Oct 2019US 10,451,344 B2Fluor Technologies Corporation
- Method of Hydrogen Liquefaction Using Optimized Claude Refrigeration Cycles2 Apr 2026US 2026/0092734 A1Evergreen Cryogenics Inc.
- Installation and method for producing liquefied hydrogen5 Jun 2025US 2025/0180285 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and Method for Turndown of a Hydrogen Precooling and/or Hydrogen Liquefaction System20 Feb 2025US 2025/0060154 A1
- Method of Hydrogen Liquefaction Using Optimized Claude Refrigeration Cycles19 Dec 2024US 2024/0418437 A1Evergreen Cryogenics Inc.
- Cryogenic Gas Cooling System and Method14 Nov 2024US 2024/0377127 A1Chart Energy & Chemicals, Inc.
Most cited
By later US patents
- Separation of H.sub.2, CO, and CH.sub.4 synthesis gas with methane wash31US 4,102,659 AUnion Carbide Corporation · 1978
- Ethane recovery and ethane rejection methods and configurations10US 10,451,344 B2Fluor Technologies Corporation · 2019
- Separation of carbon dioxide and hydrogen7US 9,163,188 B2BP Alternative Energy International Limited · 2015