F25D 21/00
Defrosting
Official title: Defrosting; Preventing frosting; Removing condensed or defrost water (removing ice or water from heat-exchange apparatus in general F28F17/00; heating arrangements specially adapted for transparent or reflecting areas H05B3/84)
F25D21/00 (Defrosting) appears on 2,342 US grants and 2,183 published applications in this corpus.
Search patents in F25D- Granted patents
- 2,342
- Published applications
- 2,183
- Assignees
- 791
- Inventors
- 4,658
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 14 | 0 |
| 1978 | 30 | 0 |
| 1979 | 27 | 0 |
| 1980 | 27 | 0 |
| 1981 | 34 | 0 |
| 1982 | 45 | 0 |
| 1983 | 32 | 0 |
| 1984 | 25 | 0 |
| 1985 | 31 | 0 |
| 1986 | 24 | 0 |
| 1987 | 18 | 0 |
| 1988 | 24 | 0 |
| 1989 | 36 | 0 |
| 1990 | 30 | 0 |
| 1991 | 25 | 0 |
| 1992 | 21 | 0 |
| 1993 | 33 | 0 |
| 1994 | 29 | 0 |
| 1995 | 18 | 0 |
| 1996 | 31 | 0 |
| 1997 | 17 | 0 |
| 1998 | 44 | 0 |
| 1999 | 45 | 0 |
| 2000 | 38 | 0 |
| 2001 | 45 | 9 |
| 2002 | 52 | 26 |
| 2003 | 35 | 36 |
| 2004 | 30 | 46 |
| 2005 | 38 | 63 |
| 2006 | 40 | 39 |
| 2007 | 29 | 69 |
| 2008 | 18 | 55 |
| 2009 | 16 | 58 |
| 2010 | 29 | 95 |
| 2011 | 31 | 81 |
| 2012 | 16 | 73 |
| 2013 | 55 | 86 |
| 2014 | 55 | 94 |
| 2015 | 74 | 119 |
| 2016 | 78 | 111 |
| 2017 | 78 | 105 |
| 2018 | 103 | 148 |
| 2019 | 126 | 107 |
| 2020 | 112 | 119 |
| 2021 | 99 | 124 |
| 2022 | 105 | 132 |
| 2023 | 95 | 112 |
| 2024 | 84 | 128 |
| 2025 | 113 | 85 |
| 2026 | 74 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Storehouse6 Oct 2026US 12,753,965 B2LG Electronics Inc.
- System to hold multiple beverage containers22 Sep 2026US 12,741,802 B22Surv, Inc.
- System to hold multiple beverage containers22 Sep 2026US 12,741,803 B22Surv, Inc.
- Meltwater management systems and methods for cold-climate heat pumps15 Sep 2026US 12,736,271 B2Treau, Inc.
- Evaporation tray for refrigerator condensation water15 Sep 2026US 12,736,272 B2I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
- Refrigerator appliance with liquid drain assembly8 Oct 2026US 2026/0309399 A1Haier US Appliance Solutions, Inc.
- Method of operating a refrigerator appliance1 Oct 2026US 2026/0298521 A1Haier US Appliance Solutions, Inc.
- Device for containing fresh produce and packaging24 Sep 2026US 2026/0287243 A1
- Evaporation tray for condensation water17 Sep 2026US 2026/0276291 A1I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
- Plant-preserving refrigerator10 Sep 2026US 2026/0266530 A1Minea Electrical Appliance Co., Ltd
Most cited
By later US patents
- Refrigerator and defrosting heater472US 6,684,659 B1Matsushita Refrigeration Company · 2004
- Frost control system for high-speed horizontal folding doors160US 4,855,567 ARytec Corporation · 1989
- Method and device for monitoring the operation of a motor150US 5,512,883 A1996
- Air hood136US 10,077,933 B2Colmac Coil Manufacturing, Inc. · 2018
- Display cabinet illumination125US 7,513,637 B2Nualight Limited · 2009