F23N 2237/26
Oxygen-air ratio
Official title: oxygen-air ratio
F23N2237/26 (Oxygen-air ratio) appears on 27 US grants and 27 published applications in this corpus.
Search patents in F23N- Granted patents
- 27
- Published applications
- 27
- Assignees
- 28
- Inventors
- 89
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 5 |
| 2013 | 1 | 4 |
| 2014 | 1 | 0 |
| 2015 | 4 | 1 |
| 2016 | 4 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control and/or regulation of a combustion apparatus6 Jan 2026US 12,516,812 B2Siemens Aktiengesellschaft
- Burner including an electrical permittivity or electrical capacitance flame sensor30 Jul 2024US 12,050,151 B2Clearsign Technologies Corporation
- Variable composition gas mixture sensor11 Jun 2024US 12,007,301 B2Clearsign Technologies Corporation
- Systems for avoiding harmonic modes of gas burners21 Mar 2023US 11,608,984 B1Brunswick Corporation
- Method and device for heating object to be heated27 Dec 2022US 11,534,823 B2Taiyo Nippon Sanso Corporation
- Adaptive Electronic Composite System17 Jul 2025US 2025/0230929 A1Siemens Aktiengesellschaft
- Burner including an electrical permittivity or electrical capacitance flame sensor7 Nov 2024US 2024/0369452 A1Clearsign Technologies Corporation
- Control and/or Regulation of a Combustion Apparatus15 Jun 2023US 2023/0184434 A1Siemens Aktiengesellschaft
- Burner including an electrical permittivity or electrical capacitance flame sensor19 Aug 2021US 2021/0254826 A1Clearsign Technologies Corporation
- Variable composition gas mixture sensor19 Aug 2021US 2021/0255063 A1Clearsign Technologies Corporation
Most cited
By later US patents
- Real time optimization and control of oxygen enhanced boilers84US 7,401,577 B2American Air Liquide, Inc. · 2008
- Oxy-fuel combustion firing configurations and methods29US 6,398,547 B1American Air Liquide, Inc. · 2002
- Control system for oxygen enriched air burner27US 4,547,150 AMidland-Ross Corporation · 1985
- Line burner assembly27US 5,131,836 AMaxon Corporation · 1992
- Solid waste-to-steam incinerator capacity enhancement by combined oxygen enrichment and liquid quench17US 5,052,310 AAir Products and Chemicals, Inc. · 1991