F23N 2231/08
For pilot flame failures
Official title: for pilot flame failures
F23N2231/08 (For pilot flame failures) appears on 31 US grants and 30 published applications in this corpus.
Search patents in F23N- Granted patents
- 31
- Published applications
- 30
- Assignees
- 25
- Inventors
- 91
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 1 | 4 |
| 2008 | 1 | 0 |
| 2009 | 2 | 3 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 3 | 0 |
| 2013 | 3 | 2 |
| 2014 | 0 | 3 |
| 2015 | 2 | 3 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Interruption of methane flow to process heating systems responsive to flame loss17 Jun 2025US 12,331,930 B1
- Method and system for controlling an ignition sequence for an intermittent flame-powered pilot combustion system8 Aug 2023US 11,719,436 B2Ademco Inc.
- Water-heating apparatus comprising combustible gas burner, in particular a storage water heater20 Jun 2023US 11,680,707 B2Sit S.P.A.
- Outdoor gas heater17 Nov 2020US 10,837,668 B2Germania Home Appliance Co., Ltd.
- Method and system for controlling an ignition sequence for an intermittent flame-powered pilot combustion system19 Feb 2019US 10,208,954 B2Ademco Inc.
- Water-heating apparatus comprising combustible gas burner, in particular a storage water heater3 Feb 2022US 2022/0034508 A1Sit S.P.A.
- Indication apparatus to indicate the output level of a pilot flame and method29 Jul 2021US 2021/0231305 A1Sit S.P.A.
- Outdoor Gas Heater2 Jul 2020US 2020/0208858 A1Germania Home Appliance Co., Ltd.
- Valvular control circuit20 Feb 2020US 2020/0056783 A1Sit S.P.A.
- Method and system for controlling an ignition sequence for an intermittent flame-powered pilot combustion system15 Aug 2019US 2019/0249871 A1Ademco Inc.
Most cited
By later US patents
- Fuel ignition control system42US 4,242,079 AJohnson Controls GmbH · 1980
- Centralized automatic pilot/pilotless ignition control system19US 4,242,078 A1980
- Spark ignited recycling ignition system with interlocking gas valve control16US 4,086,048 AInternational Telephone and Telegraph Corporation · 1978
- Heating device having a secondary safety circuit for a fuel line and method of operating the same15US 9,228,746 B2AOS Holding Company · 2016
- Intermittent pilot type burner control with a single control relay14US 5,020,988 AHoneywell Inc. · 1991