F24H 3/06
The air being kept separate from the heating medium
Official title: the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
F24H3/06 (The air being kept separate from the heating medium) appears on 687 US grants and 501 published applications in this corpus.
Search patents in F24H- Granted patents
- 687
- Published applications
- 501
- Assignees
- 305
- Inventors
- 1,146
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 12 | 0 |
| 1978 | 18 | 0 |
| 1979 | 13 | 0 |
| 1980 | 25 | 0 |
| 1981 | 10 | 0 |
| 1982 | 22 | 0 |
| 1983 | 8 | 0 |
| 1984 | 16 | 0 |
| 1985 | 26 | 0 |
| 1986 | 13 | 0 |
| 1987 | 9 | 0 |
| 1988 | 9 | 0 |
| 1989 | 8 | 0 |
| 1990 | 15 | 0 |
| 1991 | 19 | 0 |
| 1992 | 10 | 0 |
| 1993 | 11 | 0 |
| 1994 | 22 | 0 |
| 1995 | 14 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 10 | 0 |
| 2002 | 6 | 4 |
| 2003 | 8 | 10 |
| 2004 | 6 | 5 |
| 2005 | 11 | 10 |
| 2006 | 7 | 8 |
| 2007 | 0 | 6 |
| 2008 | 1 | 19 |
| 2009 | 2 | 12 |
| 2010 | 8 | 12 |
| 2011 | 8 | 31 |
| 2012 | 8 | 33 |
| 2013 | 16 | 30 |
| 2014 | 18 | 30 |
| 2015 | 17 | 32 |
| 2016 | 22 | 37 |
| 2017 | 24 | 24 |
| 2018 | 33 | 35 |
| 2019 | 35 | 31 |
| 2020 | 23 | 27 |
| 2021 | 22 | 26 |
| 2022 | 15 | 15 |
| 2023 | 18 | 17 |
| 2024 | 16 | 21 |
| 2025 | 19 | 19 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Furnace control systems and methods25 Aug 2026US 12,716,617 B2Johnson Controls Light Commercial IP GmbH
- Furnace with improved efficiency controls14 Jul 2026US 12,680,729 B1Trane International Inc.
- Furnace30 Jun 2026US 12,669,266 B2Fire Chief Industries LLC
- Gas furnace and air conditioner having the same5 May 2026US 12,618,559 B2LG Electronics Inc.
- Umbrella-shaped heater14 Apr 2026US 12,601,498 B2
- Furnace with improved efficiency controls8 Oct 2026US 2026/0309369 A1Trane International Inc.
- Forced Air Furnace with a Novel Multi-Path Heat Exchanger Section6 Aug 2026US 2026/0227096 A1
- Parking heater25 Jun 2026US 2026/0177283 A1Shenzhen Yisi Technology Co., Ltd.
- Waste-heat recirculating system, method of installation and method of use thereof30 Apr 2026US 2026/0117989 A1Highland Heat Harvesters Ltd
- Combination heating system for recreational vehicles and boats16 Apr 2026US 2026/0104181 A1Aqua-Hot Heating Systems, LLC
Most cited
By later US patents
- Multi-phase modular comfort controlled heating system131US 4,337,893 AEnergy Savings Parhelion · 1982
- Heating heat exchanger with electric heat emitter90US 5,995,711 ADenso Corporation · 1999
- Warm air furnace with premix burner78US 6,880,548 B2Honeywell International Inc. · 2005
- Space heating system, heater, and combustion chamber72US 5,553,604 A1996
- Integrated furnace control69US 5,271,556 AAmerican Standard Inc. · 1993