F23B 80/02
Combustion apparatus characterised by means creating a distinct flow path for flue
Official title: by means for returning flue gases to the combustion chamber or to the combustion zone
F23B80/02 (Combustion apparatus characterised by means creating a distinct flow path for flue) appears on 9 US grants and 13 published applications in this corpus.
Search patents in F23B- Granted patents
- 9
- Published applications
- 13
- Assignees
- 10
- Inventors
- 48
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Carbon-based oxygen-enriched combustion method for recirculation of flue gas from cement kiln24 Jun 2025US 12,339,062 B2Hangzhou Turning Energy Technology Development Co., Ltd.
- Combustor for various types of solid fuels12 Jan 2021US 10,890,321 B2
- Burner housing for a pellet grill8 Dec 2020US 10,859,259 B2Logan Outdoor Products, LLC
- High pressure fossil fuel oxy-combustion system with carbon dioxide capture for interface with an energy conversion system9 May 2017US 9,644,838 B2Her Majesty the Queen in right of Canada, as represented by the Minister of Natural Resources
- Method and device for reducing hazardous emissions in internal combustion systems15 Sep 2015US 9,134,022 B2Karlsruher Institut Fuer Technologie
- Flue gas circulation system for improving combustion characteristics and thermal characteristics of pulverized coal fired boiler3 Sep 2026US 2026/0258941 A1Xi'an Thermal Power Research Institute Co., Ltd.
- System and method for treating coal-fired flue gas22 May 2025US 2025/0161864 A1Huaneng Clean Energy Research Institute
- Carbon-based oxygen-enriched combustion method for recirculation of flue gas from cement kiln2 Feb 2023US 2023/0034842 A1Hangzhou Turning Energy Technology Development Co., Ltd.
- Burner housing for a pellet grill23 Apr 2020US 2020/0124274 A1Logan Outdoor Products, LLC
- Combustor for various types of solid fuels14 Mar 2019US 2019/0078775 A1
Most cited
By later US patents
- Apparatus for producing combustible gases from carbonaceous materials23US 4,030,895 A1977
- Method for supplying combustion gas in incineration systems6US 7,975,628 B2Covanta Energy Corporation · 2011
- Stepped floor for solid fuel boilers5US 8,707,876 B22014
- Method and device for reducing hazardous emissions in internal combustion systems3US 9,134,022 B2Karlsruher Institut Fuer Technologie · 2015
- Furnace and boiler system and method of operation thereof2US 4,292,904 A1981