F23B 90/04
Including secondary combustion
Official title: including secondary combustion (in separate combustion chambers F23B10/02)
F23B90/04 (Including secondary combustion) appears on 111 US grants and 92 published applications in this corpus.
Search patents in F23B- Granted patents
- 111
- Published applications
- 92
- Assignees
- 77
- Inventors
- 221
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 5 |
| 2012 | 0 | 3 |
| 2013 | 3 | 6 |
| 2014 | 2 | 7 |
| 2015 | 4 | 7 |
| 2016 | 3 | 6 |
| 2017 | 4 | 8 |
| 2018 | 6 | 12 |
| 2019 | 7 | 6 |
| 2020 | 9 | 6 |
| 2021 | 5 | 8 |
| 2022 | 2 | 1 |
| 2023 | 2 | 3 |
| 2024 | 5 | 5 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Detachable secondary incinerator4 Aug 2026US 12,698,903 B2Zhejiang Pan An Cherry Hardware Co., Ltd
- Downward mobile gasification boiler for surface gas phase combustion and pyrolysis of biomass briquette11 Nov 2025US 12,467,620 B2Heilongjiang Zhongtan Jiahe Biomass Technology Research and Development Co.
- Induced circulation among integrated bubbling zones14 Oct 2025US 12,440,818 B2
- Pyrolysis reaction system10 Dec 2024US 12,163,094 B2Royal Melbourne Institute of Technology
- Powder fuel feed apparatus, gasifier unit, and integrated gasification combined cycle and control method of powder fuel feed apparatus10 Dec 2024US 12,163,098 B2Mitsubishi Heavy Industries, Ltd.
- Feeding and Mixing Device20 Aug 2026US 2026/0241356 A1Orion Engineered Carbons IP GmbH & Co. KG
- Fixed bed gasifier with rollers12 Jun 2025US 2025/0186958 A1
- Pyrolysis reaction system and method of pyrolysing an organic feed20 Feb 2025US 2025/0059444 A1Royal Melbourne Institute of Technology
- Systems and methods for pyrolysis reactions28 Nov 2024US 2024/0390872 A1Clean Hydrogen Technologies Corp
- Detachable secondary incinerator3 Oct 2024US 2024/0328627 A1Zhejiang Pan An Cherry Hardware Co., Ltd
Most cited
By later US patents
- Method for apparatus for combusting fuel in a combustion chamber97US 5,154,599 A1992
- Method of capturing sulfur in coal during combustion and gasification66US 4,936,047 ABattelle Development Corporation · 1990
- Catalytic stove61US 4,319,556 AJamestown Group · 1982
- Solid fuel burner for a heating apparatus50US 6,336,449 B12002
- Integrated process for gasifying and combusting a carbonaceous fuel34US 4,602,573 ACombustion Engineering, Inc. · 1986