F23L 9/00
Passages or apertures for delivering secondary air for completing combustion of fuel
Official title: Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02)
F23L9/00 (Passages or apertures for delivering secondary air for completing combustion of fuel) appears on 290 US grants and 273 published applications in this corpus.
Search patents in F23L- Granted patents
- 290
- Published applications
- 273
- Assignees
- 208
- Inventors
- 706
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 12 | 0 |
| 2001 | 9 | 1 |
| 2002 | 7 | 8 |
| 2003 | 2 | 8 |
| 2004 | 8 | 9 |
| 2005 | 7 | 7 |
| 2006 | 3 | 6 |
| 2007 | 2 | 8 |
| 2008 | 4 | 13 |
| 2009 | 4 | 12 |
| 2010 | 6 | 14 |
| 2011 | 7 | 13 |
| 2012 | 7 | 11 |
| 2013 | 9 | 8 |
| 2014 | 6 | 17 |
| 2015 | 9 | 13 |
| 2016 | 4 | 20 |
| 2017 | 7 | 5 |
| 2018 | 8 | 11 |
| 2019 | 11 | 11 |
| 2020 | 12 | 8 |
| 2021 | 6 | 14 |
| 2022 | 6 | 16 |
| 2023 | 6 | 14 |
| 2024 | 13 | 11 |
| 2025 | 7 | 11 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Combustible fuel burning stove with pellet adapter25 Aug 2026US 12,716,581 B2Solo Brands, LLC
- Furnace30 Jun 2026US 12,669,266 B2Fire Chief Industries LLC
- Nozzle configured to deliver gas into incinerator9 Jun 2026US 12,650,225 B2Martin GmbH fur Umwelt- und Energietechnik
- Combustion device and boiler2 Jun 2026US 12,644,597 B2IHI Corporation
- Industrial solid waste incinerator and flue gas treatment apparatus28 Apr 2026US 12,613,032 B2Zhejiang Weiming Environment Protection Co., Ltd.
- Ammonia combustion furnace2 Jul 2026US 2026/0185700 A1Kawasaki Jukogyo Kabushiki Kaisha
- Solid Fuel Combustion Apparatus and Method18 Jun 2026US 2026/0168667 A1Air Products and Chemicals, Inc.
- Specialized air distribution system and air distribution method for a waste incinerator with sludge co-incineration19 Mar 2026US 2026/0078901 A1Guangdong University of Technology
- Air supply systems for combustion of granular biomass fuels15 Jan 2026US 2026/0016165 A1Aprovecho Research Center
- Burner apparatus18 Dec 2025US 2025/0383148 A1Asphalt Burner Services Ltd
Most cited
By later US patents
- Pellet fuel burning device104US 6,223,737 B12001
- Apparatus and method for reducing particulate emissions from combustion processes63US 5,702,244 AThermal Energy Systems, Incorporated · 1997
- Combustion optimization62US 6,712,606 B2Ecomb AB · 2004
- Integration of direct combustion with gasification for reduction of NOx emissions47US 6,694,900 B2General Electric Company · 2004
- Method of introducing dry sulfur oxide absorbent material into a furnace46US 4,655,148 ACombustion Engineering, Inc. · 1987