F23N 5/12
Using ionisation-sensitive elements, i.e. flame rods
Official title: using ionisation-sensitive elements, i.e. flame rods
F23N5/12 (Using ionisation-sensitive elements, i.e. flame rods) appears on 346 US grants and 210 published applications in this corpus.
Search patents in F23N- Granted patents
- 346
- Published applications
- 210
- Assignees
- 174
- Inventors
- 583
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 8 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 9 | 0 |
| 1984 | 14 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 9 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 12 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 8 |
| 2003 | 4 | 3 |
| 2004 | 5 | 7 |
| 2005 | 0 | 6 |
| 2006 | 7 | 8 |
| 2007 | 3 | 6 |
| 2008 | 2 | 2 |
| 2009 | 2 | 6 |
| 2010 | 6 | 5 |
| 2011 | 5 | 7 |
| 2012 | 3 | 10 |
| 2013 | 2 | 3 |
| 2014 | 6 | 7 |
| 2015 | 5 | 9 |
| 2016 | 6 | 14 |
| 2017 | 11 | 17 |
| 2018 | 14 | 11 |
| 2019 | 12 | 9 |
| 2020 | 9 | 13 |
| 2021 | 10 | 11 |
| 2022 | 7 | 11 |
| 2023 | 14 | 17 |
| 2024 | 4 | 14 |
| 2025 | 7 | 4 |
| 2026 | 8 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flame monitoring device for a gas burner appliance and gas burner appliance16 Jun 2026US 12,655,974 B2Pittway Sarl
- Method and controller for operating a gas burner appliance19 May 2026US 12,631,331 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.
- Power output determination by way of a fuel parameter3 Mar 2026US 12,565,994 B2Siemens Aktiengesellschaft
- Systems and methods for flame monitoring in gas-powered appliances30 Apr 2026US 2026/0117974 A1Copeland Comfort Control LP
- Flame measuring system of industrial burner and method thereof5 Jun 2025US 2025/0180204 A1Metal Industries Research & Development Centre
- Flame rectification circuit system for a gas cooktop20 Mar 2025US 2025/0093040 A1Haier US Appliance Solutions, Inc.
- Method and apparatus for monitoring and controlling combustion in combustible gas burner apparatus13 Feb 2025US 2025/0052423 A1Sit S.P.A.
- Method for Controlling a Burner and Burner Arrangement having a Burner30 Jan 2025US 2025/0035310 A1Truma Gerätetechnik GmbH & Co. KG
Most cited
By later US patents
- Burner ignition system132US 4,717,333 AAdvanced Mechanical Technology, Inc. · 1988
- Fault-tolerant multi-point flame sense circuit127US 6,794,771 B2Ranco Incorporated of Delaware · 2004
- Ignition boost and rectification flame detection circuit115US 6,222,719 B12001
- Balanced charge flame characterization system and method109US 6,084,518 AJohnson Controls Technology Company · 2000
- Constant current flame ionization circuit109US 6,509,838 B12003