F25D 21/04
Preventing the formation of frost or condensate
F25D21/04 (Preventing the formation of frost or condensate) appears on 566 US grants and 627 published applications in this corpus.
Search patents in F25D- Granted patents
- 566
- Published applications
- 627
- Assignees
- 256
- Inventors
- 1,384
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 8 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 2 |
| 2002 | 12 | 1 |
| 2003 | 3 | 7 |
| 2004 | 4 | 24 |
| 2005 | 21 | 20 |
| 2006 | 10 | 14 |
| 2007 | 7 | 18 |
| 2008 | 5 | 16 |
| 2009 | 4 | 21 |
| 2010 | 8 | 50 |
| 2011 | 11 | 28 |
| 2012 | 6 | 23 |
| 2013 | 26 | 19 |
| 2014 | 22 | 17 |
| 2015 | 23 | 34 |
| 2016 | 21 | 29 |
| 2017 | 12 | 23 |
| 2018 | 23 | 30 |
| 2019 | 28 | 28 |
| 2020 | 31 | 28 |
| 2021 | 27 | 38 |
| 2022 | 26 | 36 |
| 2023 | 32 | 35 |
| 2024 | 30 | 42 |
| 2025 | 32 | 27 |
| 2026 | 23 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Vacuum adiabatic body27 Aug 2026US 2026/0251379 A1LG Electronics Inc.
- Heat pump system and components thereof20 Aug 2026US 2026/0243481 A1Terravis Energy, Inc.
- Refrigerator20 Aug 2026US 2026/0243499 A1Samsung Electronics Co., Ltd.
- Refrigerator capable of preventing dew condensation and method therefor30 Jul 2026US 2026/0218974 A1Samsung Electronics Co., Ltd.
- Refrigerating and freezing apparatus9 Jul 2026US 2026/0194285 A1Haier Smart Home Co., Ltd.
Most cited
By later US patents
- Frost control system for high-speed horizontal folding doors160US 4,855,567 ARytec Corporation · 1989
- Air hood136US 10,077,933 B2Colmac Coil Manufacturing, Inc. · 2018
- Display cabinet illumination125US 7,513,637 B2Nualight Limited · 2009
- Ultra low temperature split door freezer99US 5,600,966 AForma Scientific, Inc. · 1997
- Optic level sensing system for use in a refrigerator97US 6,351,958 B1Whirlpool Corporation · 2002