F23L 15/00
Heating of air supplied for combustion
F23L15/00 (Heating of air supplied for combustion) appears on 825 US grants and 543 published applications in this corpus.
Search patents in F23L- Granted patents
- 825
- Published applications
- 543
- Assignees
- 484
- Inventors
- 1,708
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 13 | 0 |
| 1978 | 14 | 0 |
| 1979 | 12 | 0 |
| 1980 | 11 | 0 |
| 1981 | 17 | 0 |
| 1982 | 18 | 0 |
| 1983 | 23 | 0 |
| 1984 | 25 | 0 |
| 1985 | 15 | 0 |
| 1986 | 28 | 0 |
| 1987 | 16 | 0 |
| 1988 | 23 | 0 |
| 1989 | 21 | 0 |
| 1990 | 25 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 8 | 0 |
| 1994 | 13 | 0 |
| 1995 | 6 | 0 |
| 1996 | 20 | 0 |
| 1997 | 10 | 0 |
| 1998 | 26 | 0 |
| 1999 | 19 | 0 |
| 2000 | 18 | 0 |
| 2001 | 26 | 4 |
| 2002 | 17 | 23 |
| 2003 | 20 | 10 |
| 2004 | 12 | 18 |
| 2005 | 13 | 11 |
| 2006 | 12 | 26 |
| 2007 | 7 | 9 |
| 2008 | 11 | 15 |
| 2009 | 6 | 26 |
| 2010 | 7 | 22 |
| 2011 | 13 | 19 |
| 2012 | 9 | 28 |
| 2013 | 9 | 26 |
| 2014 | 20 | 45 |
| 2015 | 10 | 22 |
| 2016 | 20 | 25 |
| 2017 | 32 | 25 |
| 2018 | 16 | 20 |
| 2019 | 25 | 24 |
| 2020 | 23 | 25 |
| 2021 | 23 | 19 |
| 2022 | 25 | 29 |
| 2023 | 16 | 25 |
| 2024 | 20 | 16 |
| 2025 | 20 | 17 |
| 2026 | 8 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Furnace system29 Sep 2026US 12,747,860 B2Owens-Brockway Glass Container Inc.
- Zero-power-consumption self-adaptive distributed waste heat recovery and utilization system for ethylene device8 Sep 2026US 12,729,854 B2Beijing Aerospace Energy Conservation and Environmental Protection Technology Co., Ltd
- Furnace operation method11 Aug 2026US 12,703,652 B2American Air Liquide, Inc.
- High-temperature ceramic combustor with thermophotovoltaic power generation11 Aug 2026US 12,706,559 B2Massachusetts Institute of Technology
- Metal curing ovens with quick heat-up and cool-down, and processes of using same14 Jul 2026US 12,678,823 B2EPCON Industrial Services, LP
- Furnace combustion gas sensing and control systems and methods1 Oct 2026US 2026/0298468 A1
- Fluid Heating System24 Sep 2026US 2026/0292944 A1Technische Universiteit Eindhoven
- Flue gas circulation system for improving combustion characteristics and thermal characteristics of pulverized coal fired boiler3 Sep 2026US 2026/0258941 A1Xi'an Thermal Power Research Institute Co., Ltd.
- Forced Air Furnace with a Novel Multi-Path Heat Exchanger Section6 Aug 2026US 2026/0227096 A1
- Method for reducing nitrogen oxide emission and combustion system16 Jul 2026US 2026/0202054 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Single-ended recuperative radiant tube assembly and method157US 4,401,099 AW. B. Combustion, Inc. · 1983
- Method and system for reducing NO.sub.x and fuel emissions in a furnace149US 5,759,022 AGas Research Institute · 1998
- Recuperative burner with exhaust gas recirculation means118US 4,445,842 AThermal Systems Engineering, Inc. · 1984
- Heat recovery apparatus and methods of use107US 6,250,916 B1American Air Liquide, Inc. · 2001
- Oxygen fired circulating fluidized bed steam generator105US 6,505,567 B1Alstom (Switzerland) Ltd · 2003