F25B 41/39
Dispositions with two or more expansion means arranged in series, i.e. multi-stage
Official title: Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
F25B41/39 (Dispositions with two or more expansion means arranged in series, i.e. multi-stage) appears on 630 US grants and 776 published applications in this corpus.
Search patents in F25B- Granted patents
- 630
- Published applications
- 776
- Assignees
- 243
- Inventors
- 1,478
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 3 |
| 2002 | 11 | 9 |
| 2003 | 8 | 11 |
| 2004 | 8 | 7 |
| 2005 | 8 | 8 |
| 2006 | 5 | 19 |
| 2007 | 7 | 17 |
| 2008 | 12 | 15 |
| 2009 | 5 | 14 |
| 2010 | 10 | 20 |
| 2011 | 8 | 21 |
| 2012 | 9 | 29 |
| 2013 | 11 | 19 |
| 2014 | 16 | 28 |
| 2015 | 12 | 51 |
| 2016 | 23 | 46 |
| 2017 | 41 | 55 |
| 2018 | 41 | 57 |
| 2019 | 60 | 48 |
| 2020 | 47 | 52 |
| 2021 | 50 | 57 |
| 2022 | 40 | 35 |
| 2023 | 26 | 52 |
| 2024 | 39 | 44 |
| 2025 | 48 | 36 |
| 2026 | 19 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat exchange system and heat load control system1 Sep 2026US 12,723,780 B2
- Refrigeration system and method of use with a receiver tank and expander-assisted cooling11 Aug 2026US 12,704,300 B2Heatcraft Refrigeration Products LLC
- Air conditioning system14 Jul 2026US 12,680,742 B2Guangdong Meizhi Precision-Manufacturing Co., Ltd.
- Heat pump for a vehicle30 Jun 2026US 12,668,101 B2Ford Global Technologies, LLC
- Adaptive logic board for variable speed drive16 Jun 2026US 12,658,835 B2Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd.
- Two-stage compression centrifugal unit and middle air supplementing control method therefor, and heating and ventilation device20 Aug 2026US 2026/0243470 A1Chongqing Midea General Refrigeration Equipment Co., Ltd.
- Heat pump system having a separator to mitigate refrigerant maldistribution in a heat exchanger23 Jul 2026US 2026/0210594 A1Hanon Systems
- Air conditioner23 Jul 2026US 2026/0210611 A1Daikin Industries, Ltd.
- Co2 booster system with medium temperature chiller2 Jul 2026US 2026/0185748 A1Hill Phoenix, Inc.
- Refrigeration cycle apparatus2 Jul 2026US 2026/0185764 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Energy efficient air conditioning system utilizing a variable speed compressor and integrally-related expansion valves98US 5,177,972 ALiebert Corporation · 1993
- Multi-type air-conditioning system with an outdoor unit coupled to a plurality of indoor units64US 5,123,255 AKabushiki Kaisha Toshiba · 1992
- High pressure regulation in economized vapor compression cycles59US 6,385,980 B1Carrier Corporation · 2002
- Refrigeration plant and method of controlling a refrigeration plant55US 4,966,006 ADanfoss A/S · 1990
- Variable capacity staged cooling direct expansion geothermal heat pump53US 5,564,282 AMaritime Geothermal Ltd. · 1996