F25B 2313/02743
Using three four-way valves
Official title: using three four-way valves
F25B2313/02743 (Using three four-way valves) appears on 77 US grants and 81 published applications in this corpus.
Search patents in F25B- Granted patents
- 77
- Published applications
- 81
- Assignees
- 31
- Inventors
- 159
- Latest grant
- 25 Aug 2026
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 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 4 |
| 2005 | 4 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 7 |
| 2010 | 2 | 6 |
| 2011 | 2 | 1 |
| 2012 | 1 | 7 |
| 2013 | 2 | 3 |
| 2014 | 2 | 2 |
| 2015 | 2 | 13 |
| 2016 | 6 | 3 |
| 2017 | 4 | 1 |
| 2018 | 6 | 0 |
| 2019 | 7 | 4 |
| 2020 | 0 | 1 |
| 2021 | 4 | 4 |
| 2022 | 2 | 6 |
| 2023 | 2 | 7 |
| 2024 | 6 | 5 |
| 2025 | 7 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Variable refrigerant flow system and control method18 Aug 2026US 12,710,207 B2Guangdong Carrier Hvac Co., Ltd.
- Air conditioner11 Nov 2025US 12,467,666 B2LG Electronics Inc.
- Air conditioner17 Jun 2025US 12,331,969 B2LG Electronics Inc.
- Managing charge allocation and optimizing multi-mode performance of air-source integrated heat pumps27 May 2025US 12,313,304 B2UT-Battelle, LLC
- Hot water supply air-conditioning system, method of controlling hot water supply air-conditioning system, and control apparatus23 Jul 2026US 2026/0210569 A1Daikin Industries, Ltd.
- Refrigeration cycle device25 Dec 2025US 2025/0389460 A1Panasonic Intellectual Property Management Co., Ltd.
- Energy efficient heat pump with valve system and counterflow arrangement17 Oct 2024US 2024/0344746 A1Tyco Fire & Security GmbH
- Air-conditioner9 May 2024US 2024/0151425 A1Mitsubishi Electric Corporation
- Air conditioner14 Mar 2024US 2024/0085071 A1LG Electronics Inc.
Most cited
By later US patents
- Ethanol production by Escherichia coli strains co-expressing Zymomonas PDC and ADH genes126US 5,000,000 AUniversity of Florida · 1991
- Multi-circuit dehumidification heat pump system36US 7,290,399 B2Carrier Corporation · 2007
- Heat pump system having auxiliary water heating and heat exchanger bypass32US 8,074,459 B2Carrier Corporation · 2011
- Air conditioning apparatus25US 4,104,890 AMatsushita Seiko Co., Ltd. · 1978
- Refrigeration apparatus25US 5,526,649 ADaikin Industries, Ltd. · 1996