F25J 2270/30
Quasi-closed internal or closed external helium refrigeration cycle
F25J2270/30 (Quasi-closed internal or closed external helium refrigeration cycle) appears on 7 US grants and 12 published applications in this corpus.
Search patents in F25J- Granted patents
- 7
- Published applications
- 12
- Assignees
- 9
- Inventors
- 26
- Latest grant
- 23 Apr 2024
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 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 2 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Helium gas liquefier and method for liquefying helium gas23 Apr 2024US 11,965,693 B2Korea Basic Science Institute
- Carbon dioxide capturing apparatus using cold heat of liquefied natural gas and power generation system using same27 Jul 2021US 11,071,938 B2
- Helium extraction from natural gas30 Mar 2021US 10,962,283 B2Air Products and Chemicals, Inc.
- Method and device for the cryogenic separation of a methane-rich flow7 Apr 2015US 8,997,519 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- He-3 recovery from natural helium by distillation1 Apr 2014US 8,683,825 B2Air Products and Chemicals, Inc.
- Containerized Gas Processing System with Evacuated Processing Compartment19 Feb 2026US 2026/0049763 A1
- Helium separation and recovery process17 Oct 2024US 2024/0343578 A1Arjae Design Solutions Ltd.
- Method and apparatus for separation of helium-3 from helium-4 by means of a cryogenic process8 Aug 2024US 2024/0261731 A1Linde Aktiengesellschaft
- Facility and method for refrigerating a fluid28 Sep 2023US 2023/0304731 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Helium gas liquefier and method for liquefying helium gas1 Jul 2021US 2021/0199377 A1Korea Basic Science Institute
Most cited
By later US patents