F23B 50/12
The fuel being fed to the combustion zone by free fall or
Official title: the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyor terminating above the fuel bed
F23B50/12 (The fuel being fed to the combustion zone by free fall or) appears on 66 US grants and 81 published applications in this corpus.
Search patents in F23B- Granted patents
- 66
- Published applications
- 81
- Assignees
- 43
- Inventors
- 161
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 4 |
| 2008 | 1 | 4 |
| 2009 | 0 | 3 |
| 2010 | 2 | 5 |
| 2011 | 1 | 3 |
| 2012 | 3 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 5 |
| 2015 | 1 | 2 |
| 2016 | 2 | 5 |
| 2017 | 3 | 2 |
| 2018 | 2 | 5 |
| 2019 | 4 | 3 |
| 2020 | 3 | 11 |
| 2021 | 6 | 3 |
| 2022 | 6 | 10 |
| 2023 | 7 | 6 |
| 2024 | 3 | 3 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pellet grills27 Jan 2026US 12,535,219 B2
- Heating device with improved efficiency2 Sep 2025US 12,405,010 B2Suter Entfeuchtungstechnik AG
- Particle heating landscape furnace29 Jul 2025US 12,372,236 B2Haohong Electric Technology (Hubei) Co., Ltd.
- Pellet grill22 Jul 2025US 12,364,364 B2WH Products, LLC
- Pellet burner8 Jul 2025US 12,352,432 B2Shenzhen Asmoke Technology Co., Ltd.
- Solid Fuel Combustion Apparatus and Method18 Jun 2026US 2026/0168667 A1Air Products and Chemicals, Inc.
- Air supply systems for combustion of granular biomass fuels15 Jan 2026US 2026/0016165 A1Aprovecho Research Center
- Gravity fed smoker30 Jan 2025US 2025/0031903 A1W. C. Bradley Company
- Combustion chamber for pellet grills2 Jan 2025US 2025/0003595 A1
- Biomass Fuel Burning Furnace12 Dec 2024US 2024/0410569 A1Zhongshan Junwei Home Appliances Co., Ltd.
Most cited
By later US patents
- Apparatus for cooking using wood pellets62US 7,900,553 B12011
- Solid fuel burner for a heating apparatus50US 6,336,449 B12002
- High efficiency wood pellet stove49US 5,873,356 AControl Options, Inc. · 1999
- Pellet stove with enhanced air circulation efficiency37US 5,123,360 A1992
- Chip wood furnace and furnace retrofitting system34US 4,312,278 ABoard of Trustees of the University of Maine · 1982