F23N 2231/12
Fail safe: for ignition failures
Official title: for ignition failures
F23N2231/12 (Fail safe: for ignition failures) appears on 55 US grants and 52 published applications in this corpus.
Search patents in F23N- Granted patents
- 55
- Published applications
- 52
- Assignees
- 44
- Inventors
- 136
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 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 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 4 |
| 2009 | 1 | 3 |
| 2010 | 0 | 0 |
| 2011 | 1 | 7 |
| 2012 | 2 | 3 |
| 2013 | 3 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 2 | 3 |
| 2017 | 3 | 2 |
| 2018 | 0 | 4 |
| 2019 | 5 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 3 | 7 |
| 2023 | 4 | 4 |
| 2024 | 3 | 4 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Real-time flare optimization using an edge device12 May 2026US 12,624,834 B2Schlumberger Technology Corporation
- Method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler, and associated gas boiler28 Oct 2025US 12,455,076 B2ebm-papst Landshut GmbH
- Gas-burning fire installation with an igniter control system28 Oct 2025US 12,455,077 B2Travis Industries, Inc.
- Safe start-up of a cooled radiant tube burner at high temperature operation26 Aug 2025US 12,398,885 B2Honeywell International Inc.
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults13 Aug 2024US 12,060,994 B2Copeland Comfort Control LP
- Method and Controller for Operating a Gas Burner Appliance3 Oct 2024US 2024/0328621 A1Pittway Sarl
- Method and controller for operating a gas burner appliance and gas burner appliance11 Jul 2024US 2024/0230084 A1Pittway Sarl
- Real-time flare optimization using an edge device4 Jul 2024US 2024/0219023 A1Schlumberger Technology Corporation
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults8 Feb 2024US 2024/0044491 A1Copeland Comfort Control LP
- Push/Pull Furnace and Methods Related Thereto21 Dec 2023US 2023/0408083 A1Trane International Inc.
Most cited
By later US patents
- Furnace monitoring and thermostat cycling system for recreational vehicles and marine vessels56US 5,269,458 A1993
- Microcontroller and system for controlling trial times in a furnace system49US 5,026,270 AHoneywell Inc. · 1991
- System and method of fault detection in a warm air furnace42US 7,123,020 B2Honeywell International Inc. · 2006
- Fuel burner having an intermittent pilot with pre-ignition testing25US 5,035,607 AHoneywell Inc. · 1991
- Centralized automatic pilot/pilotless ignition control system19US 4,242,078 A1980