F25B 47/02
Defrosting cycles
F25B47/02 (Defrosting cycles) appears on 1,057 US grants and 1,079 published applications in this corpus.
Search patents in F25B- Granted patents
- 1,057
- Published applications
- 1,079
- Assignees
- 365
- Inventors
- 2,271
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 11 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 12 | 0 |
| 1982 | 18 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 16 | 0 |
| 1990 | 26 | 0 |
| 1991 | 17 | 0 |
| 1992 | 12 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 12 | 0 |
| 1999 | 12 | 0 |
| 2000 | 6 | 0 |
| 2001 | 19 | 1 |
| 2002 | 12 | 12 |
| 2003 | 15 | 16 |
| 2004 | 15 | 23 |
| 2005 | 13 | 29 |
| 2006 | 17 | 20 |
| 2007 | 17 | 22 |
| 2008 | 9 | 21 |
| 2009 | 6 | 23 |
| 2010 | 15 | 24 |
| 2011 | 9 | 34 |
| 2012 | 8 | 25 |
| 2013 | 18 | 33 |
| 2014 | 13 | 34 |
| 2015 | 16 | 48 |
| 2016 | 30 | 59 |
| 2017 | 46 | 60 |
| 2018 | 58 | 73 |
| 2019 | 66 | 58 |
| 2020 | 76 | 76 |
| 2021 | 61 | 63 |
| 2022 | 51 | 82 |
| 2023 | 49 | 66 |
| 2024 | 70 | 77 |
| 2025 | 55 | 64 |
| 2026 | 46 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat pump system15 Sep 2026US 12,736,259 B2The University Court of the University of Glasgow
- Cold storage, a method of operating a cold storage, and a cooling system8 Sep 2026US 12,729,887 B2Lowenco A/S
- Heat pump and control method thereof1 Sep 2026US 12,723,788 B2Kyungdong Navien Co., Ltd.
- Operation control system, operation control apparatus, and operation control method25 Aug 2026US 12,716,601 B2Daikin Industries, Ltd.
- Method of varying defrost trigger for heat pump25 Aug 2026US 12,716,630 B2Carrier Corporation
- Air conditioning appliances defrost8 Oct 2026US 2026/0309351 A1Haier US Appliance Solutions, Inc.
- System and method for selectively executing defrosting operations of an outdoor coil of an HVAC system during heating cycle17 Sep 2026US 2026/0276271 A1Lennox Industries Inc.
- Obstruction detection for a heat pump water heater system17 Sep 2026US 2026/0276272 A1Bradford White Corporation
- System for Controlling A Defrost of a Dual Flow Heat Exchanger10 Sep 2026US 2026/0266520 A1Mahle International GmbH
- Cooling system prefailure detection system and method6 Aug 2026US 2026/0227109 A1OneEvent Technologies, Inc.
Most cited
By later US patents
- Cryosurgical system and method146US 6,306,129 B1FemRx, Inc. · 2001
- Methods and apparatus for operating a refrigeration system113US 5,174,123 AThermo King Corporation · 1992
- Control device for refrigeration cycle89US 4,499,739 AMitsubishi Denki Kabushiki Kaisha · 1985
- Adaptive defrost system with ambient condition change detector89US 4,850,204 AParagon Electric Company, Inc. · 1989
- Hybrid cooling system for electronics module89US 6,213,194 B1International Business Machines Corporation · 2001