F02G 2250/18
Vuilleumier cycles
F02G2250/18 (Vuilleumier cycles) appears on 102 US grants and 6 published applications in this corpus.
Search patents in F02G- Granted patents
- 102
- Published applications
- 6
- Assignees
- 44
- Inventors
- 138
- Latest grant
- 18 Jan 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 9 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 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 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermodynamic device with a tension-compression coil spring system18 Jan 2022US 11,226,138 B2ThermoLift, Inc.
- Four-process cycle for a Vuilleumier heat pump24 Mar 2020US 10,598,126 B2ThermoLift, Inc.
- Four-process cycle for a Vuilleumier heat pump24 Jul 2018US 10,030,893 B2ThermoLift, Inc.
- Heat regenerative material formed of particles or filaments8 Jan 2002US 6,336,978 B1
- Low vibration link4 Sep 2001US 6,282,955 B1L-3 Communications Corporation
- Regenerator construction and structural design for enhanced performance in vuilleumier heat pumps16 Jul 2026US 2026/0201848 A1
- A Thermal-Compression Heat Pump With Four Chambers Separated by Three Regenerators7 Jul 2022US 2022/0214084 A1ThermoLift, Inc.
- Thermodynamic Device With a Tension-Compression Coil Spring System16 May 2019US 2019/0145670 A1ThermoLift, Inc.
- Four-Process Cycle for a Vuilleumier Heat Pump1 Nov 2018US 2018/0313296 A1ThermoLift, Inc.
- A Four-Process Cycle for a Vuilleumier Heat Pump13 Oct 2016US 2016/0298878 A1ThermoLift, Inc.
Most cited
By later US patents
- Micro miniature refrigerators142US 4,392,362 AThe Board of Trustees of the Leland Stanford Junior University · 1983
- Micromachined rate and acceleration sensor127US 5,241,861 ASundstrand Corporation · 1993
- Apparatus and process for pressure swing adsorption separation100US 4,801,308 A1989
- Method and apparatus for gas separation and synthesis77US 4,702,903 A1987
- Refrigerators56US 4,386,505 AThe Board of Trustees of the Leland Stanford Junior University · 1983