F23C 2202/50
Control of recirculation rate
F23C2202/50 (Control of recirculation rate) appears on 60 US grants and 62 published applications in this corpus.
Search patents in F23C- Granted patents
- 60
- Published applications
- 62
- Assignees
- 55
- Inventors
- 190
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 2 |
| 2004 | 4 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 4 |
| 2010 | 0 | 4 |
| 2011 | 2 | 5 |
| 2012 | 0 | 4 |
| 2013 | 7 | 7 |
| 2014 | 1 | 3 |
| 2015 | 1 | 0 |
| 2016 | 4 | 7 |
| 2017 | 1 | 1 |
| 2018 | 3 | 5 |
| 2019 | 4 | 1 |
| 2020 | 5 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 2 |
| 2023 | 0 | 3 |
| 2024 | 0 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- System and method for combustion of non-gaseous fuels and derivatives thereof6 Sep 2022US 11,435,077 B28 Rivers Capital, LLC
- Oil boiler22 Feb 2022US 11,255,574 B2Kyungdong Navien Co., Ltd.
- Oxy-combustion process with modular boiler design8 Jun 2021US 11,029,020 B2Washington University
- Combustion system capable of operating with a recycling of combustion fumes30 Jul 2026US 2026/0218900 A1Carbodown
- Recuperative burner19 Mar 2026US 2026/0078899 A1Kueppers Solutions GmbH
- Low nox gas burner with cooled flue gas recycle5 Feb 2026US 2026/0036297 A1Honeywell International Inc.
- Combustion system able to operate with recycling of the combustion gas27 Nov 2025US 2025/0362016 A1Carbodown
- Dark radiator19 Sep 2024US 2024/0310038 A1Schwank GmbH
Most cited
By later US patents
- Reduced emission combustion process with resource conservation and recovery options "ZEROS" zero-emission energy recycling oxidation system97US 5,906,806 A1999
- Fuel dilution methods and apparatus for NOx reduction88US 6,383,461 B1John Zink Company · 2002
- Fuel dilution methods and apparatus for NOx reduction64US 6,383,462 B1John Zink Company · 2002
- Combustion optimization62US 6,712,606 B2Ecomb AB · 2004
- Reduced emission combustion system51US 6,024,029 A2000