F25D 21/025
Using air pressure differential detectors
Official title: {using air pressure differential detectors}
F25D21/025 (Using air pressure differential detectors) appears on 27 US grants and 20 published applications in this corpus.
Search patents in F25D- Granted patents
- 27
- Published applications
- 20
- Assignees
- 15
- Inventors
- 42
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 3 |
| 2020 | 0 | 1 |
| 2021 | 3 | 4 |
| 2022 | 1 | 3 |
| 2023 | 2 | 1 |
| 2024 | 1 | 1 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refrigeration system with demand fluid defrost5 May 2026US 12,618,605 B2Hussmann Corporation
- Refrigerating appliance with pressure sensor18 Nov 2025US 12,474,107 B2Electrolux Appliances Aktiebolag
- Refrigerator12 Aug 2025US 12,385,683 B2LG Electronics Inc.
- Refrigerator and method for controlling refrigerator28 Jan 2025US 12,209,797 B2LG Electronics Inc.
- Refrigerator and control method of refrigerator26 Mar 2024US 11,940,200 B2LG Electronics Inc.
- Refrigeration system with demand fluid defrost28 Mar 2024US 2024/0102719 A1Hussmann Corporation
- Refrigerating appliance with pressure sensor21 Sep 2023US 2023/0296306 A1Electrolux Appliances Aktiebolag
- Transportation refrigeration unit with adaptive defrost16 Jun 2022US 2022/0187007 A1Carrier Corporation
- Refrigerator and control method of refrigerator10 Mar 2022US 2022/0074640 A1LG Electronics Inc.
- Refrigerator and method for controlling refrigerator13 Jan 2022US 2022/0011043 A1LG Electronics Inc.
Most cited
By later US patents
- Air handling system utilizing direct expansion cooling120US 5,172,565 AHoneywell Inc. · 1992
- Air handling system utilizing direct expansion cooling33US 5,131,236 AHoneywell Inc. · 1992
- System and method initiating defrost in response to speed or torque of evaporator motor29US 5,692,385 AGeneral Electric Company · 1997
- Defrost for air handling system utilizing direct expansion cooling22US 5,170,635 AHoneywell Inc. · 1992
- Air handling system utilizing direct expansion cooling21US 5,101,639 AHoneywell Inc. · 1992