F25B 2500/222
Detecting refrigerant leaks
F25B2500/222 (Detecting refrigerant leaks) appears on 453 US grants and 550 published applications in this corpus.
Search patents in F25B- Granted patents
- 453
- Published applications
- 550
- Assignees
- 174
- Inventors
- 1,037
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 8 |
| 2003 | 4 | 4 |
| 2004 | 5 | 4 |
| 2005 | 6 | 13 |
| 2006 | 7 | 7 |
| 2007 | 2 | 5 |
| 2008 | 1 | 7 |
| 2009 | 4 | 10 |
| 2010 | 7 | 3 |
| 2011 | 4 | 5 |
| 2012 | 1 | 9 |
| 2013 | 2 | 7 |
| 2014 | 3 | 4 |
| 2015 | 3 | 7 |
| 2016 | 9 | 15 |
| 2017 | 11 | 22 |
| 2018 | 14 | 28 |
| 2019 | 21 | 48 |
| 2020 | 28 | 45 |
| 2021 | 41 | 38 |
| 2022 | 40 | 78 |
| 2023 | 41 | 42 |
| 2024 | 55 | 60 |
| 2025 | 41 | 48 |
| 2026 | 26 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Detection system for refrigerant in water8 Sep 2026US 12,730,026 B2Siemens Energy Global GmbH & Co. KG
- Refrigerant leak mitigation system25 Aug 2026US 12,716,632 B2Trane International Inc.
- Systems and methods for refrigerant leakage diagnosis11 Aug 2026US 12,704,304 B2Tyco Fire & Security GmbH
- Refrigeration cycle device and refrigerant leakage determination system4 Aug 2026US 12,698,914 B2Daikin Industries, Ltd.
- Refrigerant leak detection and mitigation system and method14 Jul 2026US 12,680,709 B2
- Utilizing air moisture sensor and compressor power sensor data within a laundry appliance to detect refrigerant leaks8 Oct 2026US 2026/0308832 A1Haier US Appliance Solutions, Inc.
- Multi-type air-conditioning device8 Oct 2026US 2026/0309383 A1
- Relay control apparatus, electrical system, relay control method, apparatus, and medium17 Sep 2026US 2026/0276276 A1Gd Midea Heating & Ventilating Equipment Co., Ltd.
- Refrigerant leak mitigation system10 Sep 2026US 2026/0266522 A1Trane International Inc.
- Cooling system and airplane with cooling system3 Sep 2026US 2026/0258992 A1Airbus Operations GmbH
Most cited
By later US patents
- Refrigerant loss monitor94US 5,009,076 ATemperature Engineering Corp. · 1991
- Air conditioning apparatus92US 5,241,833 AKabushiki Kaisha Toshiba · 1993
- Low refrigerant charge protection method for a variable displacement compressor84US 5,009,074 AGeneral Motors Corporation · 1991
- Refrigerant leak detection system78US 6,772,598 B1R.S. Services, Inc. · 2004
- Low refrigerant charge detection using thermal expansion valve stroke measurement77US 5,243,829 AGeneral Electric Company · 1993