F24H 3/087
Using fluid fuel
Official title: {using fluid fuel}
F24H3/087 (Using fluid fuel) appears on 216 US grants and 207 published applications in this corpus.
Search patents in F24H- Granted patents
- 216
- Published applications
- 207
- Assignees
- 113
- Inventors
- 398
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 3 |
| 2004 | 2 | 2 |
| 2005 | 4 | 2 |
| 2006 | 1 | 3 |
| 2007 | 0 | 1 |
| 2008 | 1 | 7 |
| 2009 | 0 | 4 |
| 2010 | 4 | 5 |
| 2011 | 4 | 17 |
| 2012 | 2 | 17 |
| 2013 | 8 | 7 |
| 2014 | 5 | 9 |
| 2015 | 6 | 11 |
| 2016 | 6 | 20 |
| 2017 | 11 | 12 |
| 2018 | 17 | 14 |
| 2019 | 18 | 12 |
| 2020 | 8 | 8 |
| 2021 | 10 | 14 |
| 2022 | 8 | 8 |
| 2023 | 7 | 11 |
| 2024 | 7 | 9 |
| 2025 | 10 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Furnace with improved efficiency controls14 Jul 2026US 12,680,729 B1Trane International Inc.
- Gas furnace and air conditioner having the same5 May 2026US 12,618,559 B2LG Electronics Inc.
- Gas furnace and air conditioner having the same11 Nov 2025US 12,467,660 B2LG Electronics Inc.
- Gas furnace and air conditioner having the same4 Nov 2025US 12,460,837 B2LG Electronics Inc.
- Air handling unit30 Sep 2025US 12,429,248 B2Trane International Inc.
- 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
- Waste-heat recirculating system, method of installation and method of use thereof30 Apr 2026US 2026/0117989 A1Highland Heat Harvesters Ltd
- Mobile air heater29 Jan 2026US 2026/0029161 A1Dometic Sweden AB
- Hvac burner assembly and a method thereof16 Oct 2025US 2025/0320997 A1Carrier Corporation
Most cited
By later US patents
- Warm air furnace with premix burner78US 6,880,548 B2Honeywell International Inc. · 2005
- Integrated furnace control69US 5,271,556 AAmerican Standard Inc. · 1993
- Dual drainage slope recuperative heat exchanger assembly for fuel-fired condensing furnaces41US 5,347,980 ARheem Manufacturing Company · 1994
- Forced air condensing furnace and heat exchanger manifold therefor38US 5,775,318 AConsolidated Industries Corp. · 1998
- Compact, high efficiency heat exchanger for a fuel-fired forced air heating furnace33US 5,042,453 ARheem Manufacturing Company · 1991