F23B 7/005
With downdraught through fuel bed and grate
Official title: {with downdraught through fuel bed and grate}
F23B7/005 (With downdraught through fuel bed and grate) appears on 33 US grants and 9 published applications in this corpus.
Search patents in F23B- Granted patents
- 33
- Published applications
- 9
- Assignees
- 15
- Inventors
- 46
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electronic closed-loop control device for fireplaces comprising a lower combustion system31 Mar 2026US 12,590,703 B2Maxitrol Company
- Infrasound generator for enhancing the combustion of solid fuels13 Apr 2021US 10,974,279 B2Infrasonik AB
- Highly efficient wood stove/heater3 Dec 2019US 10,495,300 B2Liberator LLC
- Advanced ultra supercritical steam generator23 Jan 2018US 9,874,346 B2The Babcock & Wilcox Company
- Wood-pellet cogeneration unit with stirling engine in condensing technology9 Oct 2012US 8,281,584 B2
- Electronic closed-loop control device for fireplaces comprising a lower combustion system23 Jul 2026US 2026/0210553 A1Maxitrol Company
- Electronic closed-loop control device for fireplaces comprising a lower combustion system5 Sep 2024US 2024/0295324 A1Maxitrol Company
- Heating Device Using Wood Fuel21 May 2020US 2020/0158375 A1Pyroheat OÜ
- An infrasound generator for enhancing the combustion of solid fuels22 Aug 2019US 2019/0255569 A1Infrasonik AB
- Highly Efficient Wood Stove/Heater24 May 2018US 2018/0142886 A1Liberator LLC
Most cited
By later US patents
- Solid refuse furnace42US 4,213,404 AEnergy Alternatives, Inc. · 1980
- Self-powered automatic secondary air controllers for woodstoves and small furnaces36US 5,014,680 AThe United States of America as represented by the United States Department of Energy · 1991
- Powered downdraft gasifier33US 4,463,687 AE. K. Industries, Inc. · 1984
- Furnace for incinerating waste21US 4,261,269 AKernforschungsanlage Julich Gesellschaft mit beschrankter Haftung · 1981
- Solid fuel combustor and method of burning20US 4,254,715 AHague International · 1981