F25D 21/06
Removing frost
Official title: Removing frost (defrosting cycles F25B47/02)
F25D21/06 (Removing frost) appears on 679 US grants and 706 published applications in this corpus.
Search patents in F25D- Granted patents
- 679
- Published applications
- 706
- Assignees
- 275
- Inventors
- 1,499
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 9 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 15 | 0 |
| 1982 | 21 | 0 |
| 1983 | 11 | 0 |
| 1984 | 12 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 9 | 0 |
| 1994 | 9 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 13 | 0 |
| 1999 | 12 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 8 |
| 2003 | 8 | 9 |
| 2004 | 10 | 11 |
| 2005 | 8 | 21 |
| 2006 | 14 | 10 |
| 2007 | 7 | 20 |
| 2008 | 4 | 10 |
| 2009 | 6 | 17 |
| 2010 | 7 | 14 |
| 2011 | 6 | 21 |
| 2012 | 2 | 23 |
| 2013 | 11 | 27 |
| 2014 | 5 | 38 |
| 2015 | 16 | 33 |
| 2016 | 28 | 35 |
| 2017 | 29 | 47 |
| 2018 | 28 | 61 |
| 2019 | 57 | 47 |
| 2020 | 45 | 42 |
| 2021 | 33 | 39 |
| 2022 | 44 | 45 |
| 2023 | 25 | 42 |
| 2024 | 30 | 34 |
| 2025 | 37 | 27 |
| 2026 | 21 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Storehouse8 Sep 2026US 12,729,885 B2LG Electronics Inc.
- Heat pump system8 Sep 2026US 12,729,890 B2Samsung Electronics Co., Ltd.
- Refrigeration door system and door assembly with defrosting and related methods8 Sep 2026US 12,729,900 B2
- Storehouse having a heater for a heat exchanger1 Sep 2026US 12,723,800 B2LG Electronics Inc.
- Cold storage and a method of operating a cold storage9 Jun 2026US 12,650,248 B2Lowenco A/S
- Method of operating a refrigerator appliance1 Oct 2026US 2026/0298521 A1Haier US Appliance Solutions, Inc.
- Method for defrosting a primary evaporator and an auxiliary evaporator of a refrigerator appliance3 Sep 2026US 2026/0258996 A1
- Heat pump system and components thereof20 Aug 2026US 2026/0243481 A1Terravis Energy, Inc.
- A cooling appliance having an evaporator assembly20 Aug 2026US 2026/0243493 A1BSH Hausgeräte GmbH
- Refrigerator and server device capable of diagnosing state and methods thereof6 Aug 2026US 2026/0227119 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Refrigerator and defrosting heater472US 6,684,659 B1Matsushita Refrigeration Company · 2004
- Air hood136US 10,077,933 B2Colmac Coil Manufacturing, Inc. · 2018
- Refrigerator evaporator housing84US 6,209,342 B1Camco, Incorporated · 2001
- Fluid defrost system and method for secondary refrigeration systems78US 5,921,092 AHussmann Corporation · 1999
- Dual source heat pump67US 4,336,692 AAtlantic Richfield Company · 1982