F25B 47/022
Hot gas defrosting
Official title: {hot gas defrosting}
F25B47/022 (Hot gas defrosting) appears on 848 US grants and 816 published applications in this corpus.
Search patents in F25B- Granted patents
- 848
- Published applications
- 816
- Assignees
- 304
- Inventors
- 1,803
- 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 | 15 | 0 |
| 1990 | 22 | 0 |
| 1991 | 15 | 0 |
| 1992 | 10 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 13 | 1 |
| 2002 | 10 | 12 |
| 2003 | 15 | 15 |
| 2004 | 15 | 23 |
| 2005 | 13 | 26 |
| 2006 | 15 | 14 |
| 2007 | 13 | 16 |
| 2008 | 8 | 18 |
| 2009 | 6 | 18 |
| 2010 | 12 | 15 |
| 2011 | 7 | 28 |
| 2012 | 5 | 18 |
| 2013 | 13 | 26 |
| 2014 | 11 | 27 |
| 2015 | 12 | 41 |
| 2016 | 26 | 48 |
| 2017 | 33 | 49 |
| 2018 | 52 | 49 |
| 2019 | 52 | 47 |
| 2020 | 60 | 56 |
| 2021 | 46 | 47 |
| 2022 | 39 | 56 |
| 2023 | 34 | 46 |
| 2024 | 47 | 51 |
| 2025 | 39 | 46 |
| 2026 | 24 | 23 |
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
- Method of varying defrost trigger for heat pump25 Aug 2026US 12,716,630 B2Carrier Corporation
- Cold storage systems25 Aug 2026US 12,716,639 B2Trane Technologies Life Sciences LLC
- Refrigeration systems with a first compressor system and a second compressor system7 Jul 2026US 12,674,608 B2Hill Phoenix, Inc.
- Systems and methods for defrost of heat pump systems30 Jun 2026US 12,669,273 B2Goodman Manufacturing Company, L. P.
- 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
- Refrigeration cycle apparatus30 Jul 2026US 2026/0218956 A1Daikin Europe N.V.
- Refrigeration cycle device, and refrigeration cycle device control method23 Jul 2026US 2026/0210602 A1Fujitsu General Limited
- Air conditioner9 Jul 2026US 2026/0194275 A1LG Electronics 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