F23G 2209/261
Woodwaste
F23G2209/261 (Woodwaste) appears on 77 US grants and 65 published applications in this corpus.
Search patents in F23G- Granted patents
- 77
- Published applications
- 65
- Assignees
- 49
- Inventors
- 148
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 5 |
| 2010 | 1 | 3 |
| 2011 | 1 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 0 | 3 |
| 2019 | 3 | 5 |
| 2020 | 2 | 14 |
| 2021 | 6 | 2 |
| 2022 | 10 | 9 |
| 2023 | 7 | 3 |
| 2024 | 4 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pellet grills27 Jan 2026US 12,535,219 B2
- Biochar apparatus and process6 May 2025US 12,292,191 B2Air Burners, Inc.
- Ecological slope anti-corrosion timber pile, and treatment device and treatment method therefor25 Mar 2025US 12,257,737 B2Harbin Normal University
- Pellet grills12 Nov 2024US 12,140,314 B2Weber-Stephen Products LLC
- Biochar apparatus and process18 Jun 2024US 12,013,118 B2Air Burners, Inc.
- Ecological Slope Anti-corrosion Timber Pile, and Treatment Device and Treatment Method Therefor16 Jan 2025US 2025/0018596 A1Harbin Normal University
- Burning apparatus having bulk material layer to reduce particulate matter16 Jan 2025US 2025/0020326 A9
- Combustion chamber for pellet grills2 Jan 2025US 2025/0003595 A1
- Burning apparatus having bulk material layer to reduce particulate matter12 Sep 2024US 2024/0302047 A1
- Biochar apparatus and process29 Aug 2024US 2024/0288161 A1Air Burners, Inc.
Most cited
By later US patents
- Apparatus and method for reducing particulate emissions from combustion processes63US 5,702,244 AThermal Energy Systems, Incorporated · 1997
- Solid fuel burner for a heating apparatus50US 6,336,449 B12002
- High efficiency wood pellet stove49US 5,873,356 AControl Options, Inc. · 1999
- Solid refuse furnace42US 4,213,404 AEnergy Alternatives, Inc. · 1980
- Pellet fuel burner for heating and drying systems29US 5,893,358 APyro Industries, Inc. · 1999