F25B 2700/11
Sensor to detect if defrost is necessary
F25B2700/11 (Sensor to detect if defrost is necessary) appears on 130 US grants and 135 published applications in this corpus.
Search patents in F25B- Granted patents
- 130
- Published applications
- 135
- Assignees
- 93
- Inventors
- 348
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 5 |
| 2006 | 3 | 5 |
| 2007 | 3 | 6 |
| 2008 | 2 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 4 |
| 2011 | 1 | 3 |
| 2012 | 1 | 3 |
| 2013 | 1 | 3 |
| 2014 | 0 | 4 |
| 2015 | 5 | 5 |
| 2016 | 2 | 5 |
| 2017 | 5 | 10 |
| 2018 | 3 | 7 |
| 2019 | 12 | 8 |
| 2020 | 8 | 11 |
| 2021 | 13 | 9 |
| 2022 | 5 | 4 |
| 2023 | 6 | 11 |
| 2024 | 11 | 16 |
| 2025 | 10 | 4 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Obstruction detection for a heat pump water heater system16 Jun 2026US 12,656,035 B2Bradford White Corporation
- Refrigerated dryer power saving controls19 May 2026US 12,631,381 B2Ingersoll-Rand Industrial U.S., Inc.
- Heating, ventilating and air conditioning (HVAC) sensor device12 May 2026US 12,624,855 B2Belimo Holding AG
- Open-walled, temperature controlled environment12 May 2026US 12,624,875 B2Kps Global LLC
- Refrigeration system with demand fluid defrost5 May 2026US 12,618,605 B2Hussmann Corporation
- 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
- Cooling storage, method for controlling cooling storage, and cooling storage management system27 Aug 2026US 2026/0248302 A1Panasonic Intellectual Property Management Co., Ltd.
- Defrost systems and methods for heat pump water heaters5 Feb 2026US 2026/0036352 A1Rheem Manufacturing Company
- Systems and Methods to Defrost an Evaporator22 Jan 2026US 2026/0022876 A1Rheem Manufacturing Company
Most cited
By later US patents
- Refrigeration evaporators with ice detectors74US 4,037,427 A1977
- Refrigeration control system with self-adjusting defrost interval74US 4,750,332 AEaton Corporation · 1988
- Method of optimising the performance of refrigerant vaporizers including improved frost control method and apparatus53US 5,233,841 AKuba Kaltetechnik GmbH · 1993
- Heat exchange apparatus and method having two refrigeration circuits45US 4,332,137 ACarrier Corporation · 1982
- Refrigeration system31US 6,981,385 B2Delaware Capital Formation, Inc. · 2006