F25D 21/08
By electric heating
Official title: by electric heating
F25D21/08 (By electric heating) appears on 358 US grants and 457 published applications in this corpus.
Search patents in F25D- Granted patents
- 358
- Published applications
- 457
- Assignees
- 161
- Inventors
- 943
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 2 |
| 2002 | 3 | 8 |
| 2003 | 4 | 5 |
| 2004 | 7 | 5 |
| 2005 | 5 | 17 |
| 2006 | 10 | 9 |
| 2007 | 7 | 13 |
| 2008 | 4 | 9 |
| 2009 | 4 | 13 |
| 2010 | 4 | 11 |
| 2011 | 4 | 13 |
| 2012 | 2 | 14 |
| 2013 | 6 | 15 |
| 2014 | 1 | 11 |
| 2015 | 8 | 15 |
| 2016 | 9 | 12 |
| 2017 | 12 | 33 |
| 2018 | 10 | 31 |
| 2019 | 36 | 33 |
| 2020 | 26 | 29 |
| 2021 | 26 | 32 |
| 2022 | 30 | 31 |
| 2023 | 19 | 30 |
| 2024 | 21 | 25 |
| 2025 | 26 | 24 |
| 2026 | 14 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- Accessible cooling environment9 Jun 2026US 12,650,256 B2Kps Global LLC
- Refrigerator2 Jun 2026US 12,644,637 B2LG Electronics Inc.
- Defrost system for a conditioned space19 May 2026US 12,631,390 B1Tippmann Engineering, LLC
- 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
- A cooling appliance having an evaporator assembly20 Aug 2026US 2026/0243493 A1BSH Hausgeräte GmbH
- Field-installable refrigerated cabinet kit with on-cabinet refrigeration system23 Jul 2026US 2026/0206986 A1True Manufacturing Co., Inc.
- Field-installable refrigerated cabinet kit with on-cabinet refrigeration system16 Jul 2026US 2026/0198706 A1True Manufacturing Co., Inc.
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
- Portable cooling apparatus56US 4,170,998 AChattanooga Pharmacal Company · 1979
- Refrigeration control system for optimum demand operation46US 4,084,388 AHoneywell Inc. · 1978