F23N 2225/30
Measuring lambda
Official title: measuring lambda
F23N2225/30 (Measuring lambda) appears on 34 US grants and 24 published applications in this corpus.
Search patents in F23N- Granted patents
- 34
- Published applications
- 24
- Assignees
- 28
- Inventors
- 73
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 3 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 0 |
| 2011 | 3 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 3 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for operating a gas burner and gas burner for performing the method28 Apr 2026US 12,613,033 B2Viessmann Climate Solutions SE
- 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
- Detecting blockage of a duct of a burner assembly25 Jan 2022US 11,231,174 B2Siemens Aktiengesellschaft
- Method for estimating water content, and estimation device17 Aug 2021US 11,092,336 B2Denso Wave Incorporated
- Burner including an electrical permittivity or electrical capacitance flame sensor7 Nov 2024US 2024/0369452 A1Clearsign Technologies Corporation
- Method for operating a gas burner and gas burner for performing the method11 May 2023US 2023/0144467 A1Viessmann Climate Solutions SE
- 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
- Method for estimating water content, and estimation device19 Mar 2020US 2020/0088406 A1Denso Wave Incorporated
Most cited
By later US patents
- Flame ionization control apparatus and method78US 5,971,745 AGas Research Institute · 1999
- Method and apparatus for optimizing fuel-to-air ratio in the combustible gas supply of a radiant burner74US 5,037,291 ACarrier Corporation · 1991
- Method and apparatus for controlling fuel-to-air ratio of the combustible gas supply of a radiant burner64US 5,112,217 ACarrier Corporation · 1992
- Flame ionization control of a partially premixed gas burner with regulated secondary air47US 4,588,372 AHoneywell Inc. · 1986
- Method for setting the air ratio on a firing device and a firing device29US 7,922,481 B2ebm-papst Landshut GmbH · 2011