F23N 2227/28
Ignition circuits
F23N2227/28 (Ignition circuits) appears on 150 US grants and 67 published applications in this corpus.
Search patents in F23N- Granted patents
- 150
- Published applications
- 67
- Assignees
- 81
- Inventors
- 249
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 14 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 2 |
| 2005 | 3 | 0 |
| 2006 | 1 | 4 |
| 2007 | 0 | 3 |
| 2008 | 1 | 3 |
| 2009 | 5 | 1 |
| 2010 | 0 | 5 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 6 | 2 |
| 2015 | 0 | 2 |
| 2016 | 0 | 3 |
| 2017 | 1 | 4 |
| 2018 | 3 | 3 |
| 2019 | 2 | 3 |
| 2020 | 5 | 7 |
| 2021 | 4 | 3 |
| 2022 | 3 | 5 |
| 2023 | 6 | 3 |
| 2024 | 3 | 4 |
| 2025 | 1 | 1 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Alternate pilot light ignition for gas powered appliances with electric ignition assembly26 Aug 2025US 12,398,884 B2Haier US Appliance Solutions, Inc.
- High-capacity igniter3 Dec 2024US 12,158,268 B2Forney Corporation
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults13 Aug 2024US 12,060,994 B2Copeland Comfort Control LP
- Minimum ignition period for gas burners23 Jul 2024US 12,044,406 B2Midea Group Co., Ltd.
- Switching assembly, switching mechanism and gas cooker26 Dec 2023US 11,852,339 B2Electrolux Appliances Aktiebolag
- Gas ignition system for a gas cooking appliance23 Jul 2026US 2026/0210558 A1Haier US Appliance Solutions, Inc.
- Combustion device and hot water device including same5 Mar 2026US 2026/0063330 A1Noritz Corporation
- Circuit including supercapacitor for supplying power to leak detection circuitry and controller in water heater12 Feb 2026US 2026/0043587 A1Ademco Inc.
- Combustion heat source device22 Jan 2026US 2026/0022835 A1Rinnai Corporation
- Timed combustion device10 Apr 2025US 2025/0116406 A1Snowie LLC
Most cited
By later US patents
- Ignition control system for a gas appliance131US 4,695,246 ALennox Industries Inc. · 1987
- Ignition boost and rectification flame detection circuit115US 6,222,719 B12001
- Thermally amplified and stimulated emission radiator fiber matrix burner66US 5,356,487 AThe Quantum Group, Inc. · 1994
- Electronic grill control59US 5,033,449 AThermos L L.C. · 1991
- Self-powered gas appliance50US 4,906,178 AThe Quantum Group, Inc. · 1990