F24H 3/006
Air heaters: using fluid fuel
Official title: {using fluid fuel}
F24H3/006 (Air heaters: using fluid fuel) appears on 61 US grants and 91 published applications in this corpus.
Search patents in F24H- Granted patents
- 61
- Published applications
- 91
- Assignees
- 49
- Inventors
- 132
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 5 |
| 2011 | 1 | 3 |
| 2012 | 2 | 6 |
| 2013 | 5 | 3 |
| 2014 | 4 | 8 |
| 2015 | 3 | 11 |
| 2016 | 4 | 13 |
| 2017 | 3 | 6 |
| 2018 | 4 | 3 |
| 2019 | 8 | 4 |
| 2020 | 1 | 1 |
| 2021 | 6 | 6 |
| 2022 | 1 | 7 |
| 2023 | 3 | 0 |
| 2024 | 4 | 5 |
| 2025 | 3 | 0 |
| 2026 | 0 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for operating a furnace system15 Jul 2025US 12,359,846 B2Johnson Controls Light Commercial IP GmbH
- Variable capacity furnace control3 Jun 2025US 12,320,551 B2Johnson Controls Light Commercial IP GmbH
- Method, system and temperature control of a heating, ventilation and air conditioning unit20 May 2025US 12,305,887 B2Carrier Corporation
- Systems and methods of detecting an obstructed furnace air filter using a pressure sensor17 Sep 2024US 12,092,352 B2Rheem Manufacturing Company
- Fuel-fired appliance with exhaust dilution20 Aug 2024US 12,066,217 B2Rheem Manufacturing Company
- Furnace combustion gas sensing and control systems and methods1 Oct 2026US 2026/0298468 A1
- Fuel gas heating furnace23 Jul 2026US 2026/0210581 A1Changzhou Wellife Furnace Co., Ltd.
- Heat pump with refrigerant detection and temperature-based operation25 Jun 2026US 2026/0177295 A1Mitsubishi Electric US, Inc.
- Air heating apparatus12 Mar 2026US 2026/0071828 A1Kyungdong Navien Co., Ltd.
- Systems and methods for hybrid heating system control26 Feb 2026US 2026/0055928 A1Honeywell International Inc.
Most cited
By later US patents
- Heater configured to operate with a first or second fuel49US 7,677,236 B22010
- Heater configured to operate with a first or second fuel42US 7,967,007 B22011
- Heater configured to operate with a first or second fuel27US 8,235,708 B2Continental Appliances, Inc. · 2012
- Dual fuel heating system and air shutter23US 8,757,139 B22014
- Heater attachment for L.P. gas container19US 4,063,876 A1977