F23L 1/02
Passages or apertures for delivering primary air for combustion: by discharging the
Official title: by discharging the air below the fire
F23L1/02 (Passages or apertures for delivering primary air for combustion: by discharging the) appears on 128 US grants and 65 published applications in this corpus.
Search patents in F23L- Granted patents
- 128
- Published applications
- 65
- Assignees
- 75
- Inventors
- 181
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 11 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 1 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 5 |
| 2008 | 3 | 3 |
| 2009 | 1 | 5 |
| 2010 | 0 | 0 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 4 | 3 |
| 2014 | 1 | 2 |
| 2015 | 1 | 3 |
| 2016 | 1 | 3 |
| 2017 | 1 | 3 |
| 2018 | 1 | 3 |
| 2019 | 6 | 2 |
| 2020 | 3 | 4 |
| 2021 | 4 | 3 |
| 2022 | 1 | 5 |
| 2023 | 2 | 7 |
| 2024 | 3 | 1 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radiant tube burner, radiant tube, and method of designing radiant tube burner14 Apr 2026US 12,601,476 B2Jfe Steel Corporation
- Biomass burner and corresponding biomass combustion method11 Nov 2025US 12,467,621 B2Blucomb S.R.L.
- Apparatus for controlling an air inlet valve for a solid fuel burner2 Sep 2025US 12,405,008 B2Otter Controls Limited
- Heating device with improved efficiency2 Sep 2025US 12,405,010 B2Suter Entfeuchtungstechnik AG
- Flow-directing element, flow-directing system and heating apparatus11 Mar 2025US 12,246,581 B2Webasto SE
- 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
- Fire pit with fire grate22 May 2025US 2025/0164111 A1Solo Brands, LLC
- Fire pit with fire grate9 Jan 2025US 2025/0012440 A1Solo Brands, LLC
- System and Method for Bimodal Air Control in a Kettle-style Grill29 Feb 2024US 2024/0068666 A1Spider Grills, LLC
Most cited
By later US patents
- Pellet fuel burning device104US 6,223,737 B12001
- Ignition inhibiting gas water heater49US 5,797,355 ASRP 687 Pty. Ltd. · 1998
- Incinerator with two reburn stages, and, optionally, heat recovery23US 4,438,705 A1984
- Burning apparatus with means for heating and cleaning polluted products of combustion23US 4,724,776 A1988
- Device for supply of secondary air, and boiler with the device22US 4,903,616 A1990