F25D 21/02
Detecting the presence of frost or condensate
F25D21/02 (Detecting the presence of frost or condensate) appears on 249 US grants and 186 published applications in this corpus.
Search patents in F25D- Granted patents
- 249
- Published applications
- 186
- Assignees
- 145
- Inventors
- 540
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 8 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 1 |
| 2002 | 7 | 1 |
| 2003 | 3 | 2 |
| 2004 | 1 | 4 |
| 2005 | 4 | 5 |
| 2006 | 2 | 3 |
| 2007 | 2 | 5 |
| 2008 | 1 | 3 |
| 2009 | 1 | 2 |
| 2010 | 2 | 7 |
| 2011 | 3 | 7 |
| 2012 | 1 | 9 |
| 2013 | 1 | 5 |
| 2014 | 4 | 6 |
| 2015 | 3 | 5 |
| 2016 | 8 | 9 |
| 2017 | 8 | 8 |
| 2018 | 4 | 12 |
| 2019 | 11 | 16 |
| 2020 | 8 | 15 |
| 2021 | 13 | 11 |
| 2022 | 14 | 8 |
| 2023 | 5 | 13 |
| 2024 | 5 | 10 |
| 2025 | 13 | 14 |
| 2026 | 9 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automated cryogenic storage system26 May 2026US 12,637,285 B2Azenta US, Inc.
- Open-walled, temperature controlled environment12 May 2026US 12,624,875 B2Kps Global LLC
- Ventilation door device for refrigerator5 May 2026US 12,618,604 B2Jiangsu Leili Motor Co., Ltd.
- Refrigeration system with demand fluid defrost5 May 2026US 12,618,605 B2Hussmann Corporation
- Refrigerator with dynamic multi-zone anti-sweat heating system24 Mar 2026US 12,584,678 B2Midea Group Co., Ltd.
- Refrigerator and server device capable of diagnosing state and methods thereof6 Aug 2026US 2026/0227119 A1Samsung Electronics Co., Ltd.
- Method for operating a heat exchanger and system comprising a heat exchanger9 Jul 2026US 2026/0194316 A1Guntner GmbH & Co. KG
- Freezer Malfunction Notification Device18 Jun 2026US 2026/0168718 A1
- Refrigerator9 Apr 2026US 2026/0098678 A1LG Electronics Inc.
- Compact Freezer Unit12 Mar 2026US 2026/0071804 A1
Most cited
By later US patents
- Air handling system utilizing direct expansion cooling120US 5,172,565 AHoneywell Inc. · 1992
- Condensation control system for heated insulating glass units110US 6,144,017 ALibbey-Owens-Ford Co. · 2000
- Electronically controlled beverage dispenser105US 5,732,563 AIMI Cornelius Inc. · 1998
- Blocked fan detection system for heat pump96US 5,440,890 ACopeland Corporation · 1995
- Devices and methods for sensing condensation conditions and for preventing and removing condensation from surfaces96US 6,886,351 B22005