F24F 1/0041
Characterised by exhaustion of inside air from the room
Official title: characterised by exhaustion of inside air from the room (in combination with simultaneous introduction of outside air F24F1/0038)
F24F1/0041 (Characterised by exhaustion of inside air from the room) appears on 28 US grants and 29 published applications in this corpus.
Search patents in F24F- Granted patents
- 28
- Published applications
- 29
- Assignees
- 25
- Inventors
- 76
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 5 |
| 2020 | 0 | 3 |
| 2021 | 3 | 6 |
| 2022 | 3 | 3 |
| 2023 | 3 | 3 |
| 2024 | 4 | 3 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for refrigerant leak management16 Dec 2025US 12,498,130 B2Tyco Fire & Security GmbH
- Air conditioning device2 Dec 2025US 12,486,999 B2Gd Midea Air-Conditioning Equipment Co., Ltd.
- System for air conditioning the interior of a building that guides exhaust air into a fluid reservoir via a heat exchanger20 May 2025US 12,305,878 B2Envola GmbH
- Indoor unit apparatus of split-type air conditioner and method for using the same25 Feb 2025US 12,235,011 B2Tianjin Chengjian University
- Clean negative pressure hospital room system using compressor and turbine26 Nov 2024US 12,152,792 B2Korea Institute of Energy Research
- Wall vent for air conditioning unit17 Apr 2025US 2025/0123007 A1Mitchel Construction and Remodeling Services, LLC
- Fresh air integrated machine10 Oct 2024US 2024/0337410 A1Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd.
- Air conditioning device29 Feb 2024US 2024/0068696 A1Gd Midea Air-Conditioning Equipment Co., Ltd.
- Systems and methods for refrigerant leak management25 Jan 2024US 2024/0027085 A1Johnson Controls Tyco IP Holdings LLP
- System for air conditioning the interior of a building24 Aug 2023US 2023/0266037 A1Envola GmbH
Most cited
By later US patents
- Air intake and blowing device60US 6,551,185 B1Daikin Industries, Ltd. · 2003
- Systems and methods for refrigerant leak management25US 10,514,176 B2Johnson Controls Technology Company · 2019
- Method for indirect-evaporative air cooling23US 4,977,753 A1990
- Systems and methods for refrigerant leak management19US 11,041,647 B2Johnson Controls Technology Company · 2021
- Multifunctional ceiling air-conditioning circulation machine17US 7,908,879 B12011