F23N 2229/00
Flame sensors
F23N2229/00 (Flame sensors) appears on 608 US grants and 417 published applications in this corpus.
Search patents in F23N- Granted patents
- 608
- Published applications
- 417
- Assignees
- 332
- Inventors
- 1,270
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 19 | 0 |
| 1979 | 10 | 0 |
| 1980 | 10 | 0 |
| 1981 | 15 | 0 |
| 1982 | 3 | 0 |
| 1983 | 17 | 0 |
| 1984 | 16 | 0 |
| 1985 | 10 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 16 | 0 |
| 1990 | 14 | 0 |
| 1991 | 18 | 0 |
| 1992 | 16 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 9 | 0 |
| 1996 | 12 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 14 | 0 |
| 2000 | 12 | 0 |
| 2001 | 9 | 2 |
| 2002 | 6 | 4 |
| 2003 | 4 | 5 |
| 2004 | 5 | 7 |
| 2005 | 1 | 7 |
| 2006 | 6 | 22 |
| 2007 | 5 | 13 |
| 2008 | 8 | 8 |
| 2009 | 7 | 15 |
| 2010 | 14 | 19 |
| 2011 | 9 | 18 |
| 2012 | 13 | 16 |
| 2013 | 13 | 12 |
| 2014 | 17 | 15 |
| 2015 | 9 | 19 |
| 2016 | 8 | 22 |
| 2017 | 15 | 14 |
| 2018 | 20 | 24 |
| 2019 | 19 | 21 |
| 2020 | 19 | 24 |
| 2021 | 16 | 26 |
| 2022 | 13 | 29 |
| 2023 | 29 | 31 |
| 2024 | 19 | 22 |
| 2025 | 19 | 15 |
| 2026 | 15 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 2229/12Flame sensors: with flame rectification current detecting meansIndexing code96
- F23N 2229/20Camera viewingIndexing code96
- F23N 2229/16Flame sensors: using two or more of the same types of flameIndexing code61
- F23N 2229/02Pilot flame sensorsIndexing code58
- F23N 2229/04Sensitive to the colour of flamesIndexing code45
- F23N 2229/08Detecting flame flickerIndexing code45
- F23N 2229/14Flame sensors: using two or more different types of flame sensorIndexing code40
- F23N 2229/18Flame sensor cooling meansIndexing code25
Recent patents
- Dual fuel valve8 Sep 2026US 12,729,851 B2GDA Valve Technology Co., Ltd.
- Control unit for detecting a flame in operation using flame monitors suitable for burners and flame monitoring system1 Sep 2026US 12,723,756 B2BFI Automation Mindermann GmbH
- Push/pull furnace and methods related thereto14 Jul 2026US 12,680,693 B2Trane International Inc.
- Flame monitoring device for a gas burner appliance and gas burner appliance16 Jun 2026US 12,655,974 B2Pittway Sarl
- Monitoring combustible matter in a gaseous stream2 Jun 2026US 12,644,599 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Dual fuel valve17 Sep 2026US 2026/0276192 A1GDA Valve Technology Co., Ltd.
- Hydrogen gas burner10 Sep 2026US 2026/0266459 A1Amf Den Boer B.V.
- Fuel identification and flame behavior monitoring system28 May 2026US 2026/0146737 A1Carrier Corporation
- Optical diagnosis system and method for ignition of single-particle excavate waste21 May 2026US 2026/0139832 A1Tianjin University
- Systems and methods for flame monitoring in gas-powered appliances30 Apr 2026US 2026/0117974 A1Copeland Comfort Control LP
Most cited
By later US patents
- Integrated appliance control system186US 6,059,195 ATridelta Industries, Inc. · 2000
- Burner ignition system132US 4,717,333 AAdvanced Mechanical Technology, Inc. · 1988
- Ignition control system for a gas appliance131US 4,695,246 ALennox Industries Inc. · 1987
- Integrated furnace control having ignition and pressure switch diagnostics129US 4,842,510 AHamilton Standard Controls, Inc. · 1989
- Fault-tolerant multi-point flame sense circuit127US 6,794,771 B2Ranco Incorporated of Delaware · 2004