F23C 9/006
The recirculation taking place in the combustion chamber
Official title: {the recirculation taking place in the combustion chamber}
F23C9/006 (The recirculation taking place in the combustion chamber) appears on 255 US grants and 156 published applications in this corpus.
Search patents in F23C- Granted patents
- 255
- Published applications
- 156
- Assignees
- 158
- Inventors
- 485
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 12 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 9 | 4 |
| 2002 | 4 | 4 |
| 2003 | 8 | 5 |
| 2004 | 9 | 9 |
| 2005 | 7 | 12 |
| 2006 | 7 | 6 |
| 2007 | 3 | 6 |
| 2008 | 5 | 7 |
| 2009 | 2 | 4 |
| 2010 | 2 | 7 |
| 2011 | 6 | 3 |
| 2012 | 2 | 5 |
| 2013 | 2 | 5 |
| 2014 | 7 | 7 |
| 2015 | 3 | 4 |
| 2016 | 5 | 7 |
| 2017 | 5 | 7 |
| 2018 | 3 | 6 |
| 2019 | 7 | 3 |
| 2020 | 4 | 4 |
| 2021 | 6 | 6 |
| 2022 | 4 | 11 |
| 2023 | 4 | 7 |
| 2024 | 7 | 11 |
| 2025 | 9 | 3 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refractory block for low NOx burners with internal flue gas recirculation6 Oct 2026US 12,753,916 B2Honeywell International Inc.
- Process burner with distal flame holder25 Aug 2026US 12,716,582 B2
- Fuel-air mixing and flame stabilization device for a low emission burner with internal flue gas recirculation26 May 2026US 12,638,174 B2Honeywell International Inc.
- Device and method for supplying combustion air and for recirculating exhaust gas for a burner3 Mar 2026US 12,565,991 B2WS Warmeprozesstechnik GmbH
- Low NOx gas burner with cooled flue gas recycle4 Nov 2025US 12,460,814 B2Honeywell International Inc.
- A burner and a process for combusting metal powder3 Sep 2026US 2026/0258942 A1
- Apparatus and methods for boosting efficiency on recuperative radiant tube systems25 Jun 2026US 2026/0177239 A1Fives North American Combustion, Inc.
- Low nox gas burner with cooled flue gas recycle5 Feb 2026US 2026/0036297 A1Honeywell International Inc.
- Burner, furnace and method of generating a flame18 Dec 2025US 2025/0383079 A1Messer Industries USA, Inc.
- Low nox, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system23 Oct 2025US 2025/0327568 A1Saint-Gobain Ceramics & Plastics, Inc.
Most cited
By later US patents
- Low NO.sub.x formation burner apparatus and methods152US 5,195,884 AJohn Zink Company, a Division of Koch Engineering Company, Inc. · 1993
- Low NO.sub.x burner assemblies133US 5,073,105 ACallidus Technologies, Inc. · 1991
- Low NO.sub.x gas burner apparatus and methods121US 5,238,395 AJohn Zink Company · 1993
- Nitrogen oxide control using internally recirculated flue gas118US 5,135,387 AIT-McGill Environmental Systems, Inc. · 1992
- Nitrogen oxide control using internally recirculated flue gas115US 5,044,932 AIT-McGill Pollution Control Systems, Inc. · 1991