F25J 2270/91
Using pulse tube refrigeration
Official title: using pulse tube refrigeration
F25J2270/91 (Using pulse tube refrigeration) appears on 28 US grants and 23 published applications in this corpus.
Search patents in F25J- Granted patents
- 28
- Published applications
- 23
- Assignees
- 25
- Inventors
- 100
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 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 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 0 |
| 2003 | 3 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 4 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 3 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 3 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Automated stirling peltier liquid air battery16 Jun 2026US 12,656,025 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Cryocooler suitable for gas liquefaction applications, gas liquefaction system and method comprising the same21 Oct 2025US 12,449,196 B2Consejo Superior De Investigaciones Cientificas (Csic)
- Progressively chilled gas separation tanks2 Sep 2025US 12,405,056 B1Lunar Helium-3 Mining, LLC
- Device and method for purifying a gas mixture8 Sep 2020US 10,767,923 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Small-scale hydrogen liquefaction system equipped with cryocooler7 Apr 2020US 10,612,841 B2Hylium Industries, Inc.
- Cryogenic cooling system3 Sep 2026US 2026/0257609 A1
- Reciprocating rapid cooldown loop for cryogenic devices28 May 2026US 2026/0146789 A1Maybell Quantum Industries, Inc.
- Cryocooler Suitable for Gas Liquefaction Applications, Gas Liquefaction System and Method Comprising the Same8 Aug 2024US 2024/0263872 A1Consejo Superior De Investigaciones Cientificas (Csic)
- Automated stirling-pelitier liquid air battery13 Jun 2024US 2024/0191912 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Methods and systems for generating limited access non-fungible tokens13 Jun 2024US 2024/0195626 A1
Most cited
By later US patents
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator101US 6,681,764 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator91US 6,651,653 B1SeQual Technologies, Inc. · 2003
- Integrated refueling system for vehicles64US 5,505,232 ACryoFuel Systems, Inc. · 1996