F25B 2309/1422
Pulse tubes with basic schematic including a counter flow heat exchanger instead
Official title: Pulse tubes with basic schematic including a counter flow heat exchanger instead of a regenerative heat exchanger
F25B2309/1422 (Pulse tubes with basic schematic including a counter flow heat exchanger instead) appears on 5 US grants and 2 published applications in this corpus.
Search patents in F25B- Granted patents
- 5
- Published applications
- 2
- Assignees
- 5
- Inventors
- 11
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 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 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 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 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydrogen or helium throttling liquefaction system using direct current flow from the cold and hot ends of the regenerative cryocoolers23 Dec 2025US 12,504,225 B2Zhejiang University
- Cryogenic refrigerator and heating method for pulse tube cryocooler10 May 2022US 11,326,811 B2Sumitomo Heavy Industries, Ltd.
- High efficiency modular cryocooler with floating piston expander27 Mar 2001US 6,205,791 B1Massachusetts Institute of Technology
- Pulse tube refrigerating system4 Jan 1994US 5,275,002 AAisin Newhard Co., Ltd.
- Stirling-cycle refrigerator11 Jun 1985US 4,522,032 AAisin Seiki Kabushiki Kaisha
- A hydrogen or helium throttling liquefaction system using direct current flow from the cold and hot ends of the regenerative cryocoolers8 Aug 2024US 2024/0263871 A1Zhejiang University
- Cryogenic refrigerator and heating method for pulse tube cryocooler28 May 2020US 2020/0166247 A1Sumitomo Heavy Industries, Ltd.
Most cited
By later US patents