F23N 2229/12
Flame sensors: with flame rectification current detecting means
Official title: with flame rectification current detecting means
F23N2229/12 (Flame sensors: with flame rectification current detecting means) appears on 96 US grants and 70 published applications in this corpus.
Search patents in F23N- Granted patents
- 96
- Published applications
- 70
- Assignees
- 61
- Inventors
- 160
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 5 |
| 2007 | 1 | 4 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 3 | 3 |
| 2011 | 0 | 3 |
| 2012 | 0 | 3 |
| 2013 | 1 | 0 |
| 2014 | 4 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 5 |
| 2017 | 2 | 4 |
| 2018 | 3 | 5 |
| 2019 | 6 | 5 |
| 2020 | 6 | 3 |
| 2021 | 4 | 5 |
| 2022 | 2 | 3 |
| 2023 | 7 | 10 |
| 2024 | 2 | 4 |
| 2025 | 3 | 2 |
| 2026 | 6 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flame monitoring device for a gas burner appliance and gas burner appliance16 Jun 2026US 12,655,974 B2Pittway Sarl
- Flame rectification circuit system for a gas cooktop21 Apr 2026US 12,607,360 B2Haier US Appliance Solutions, Inc.
- System and method to detect flame rod/sensor malfunction24 Mar 2026US 12,584,629 B2Fireye, Inc.
- Closed-loop control of a combustion apparatus3 Mar 2026US 12,565,995 B2Siemens Aktiengesellschaft
- Premixing apparatus3 Mar 2026US 12,565,997 B2Rinnai Corporation
- Systems and methods for flame monitoring in gas-powered appliances30 Apr 2026US 2026/0117974 A1Copeland Comfort Control LP
- Systems and Methods for Pre-Ignition Moisture Removal in Heating Alliances12 Feb 2026US 2026/0043543 A1Rheem Manufacturing Company
- Flame rectification circuit system for a gas cooktop20 Mar 2025US 2025/0093040 A1Haier US Appliance Solutions, Inc.
- Gas safety shutoff2 Jan 2025US 2025/0003596 A1Lynx Grills, Inc.
- Furnace, system, and method for calibrating flame current in furnace24 Oct 2024US 2024/0353103 A1Carrier Corporation
Most cited
By later US patents
- Balanced charge flame characterization system and method109US 6,084,518 AJohnson Controls Technology Company · 2000
- Fuel control system, parts therefor and methods of making and operating the same59US 5,577,905 ARobertshaw Controls Company · 1996
- Method and apparatus for detecting combustion instability in continuous combustion systems44US 7,204,133 B2Woodward Governor Company · 2007
- Flame rectification sensor employing pulsed excitation43US 5,472,336 AHoneywell Inc. · 1995
- Dual firing rate flame sensing system39US 4,457,692 AHoneywell Inc. · 1984