F23N 2227/00
Ignition or checking
F23N2227/00 (Ignition or checking) appears on 913 US grants and 543 published applications in this corpus.
Search patents in F23N- Granted patents
- 913
- Published applications
- 543
- Assignees
- 440
- Inventors
- 1,625
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 17 | 0 |
| 1978 | 26 | 0 |
| 1979 | 18 | 0 |
| 1980 | 18 | 0 |
| 1981 | 20 | 0 |
| 1982 | 10 | 0 |
| 1983 | 26 | 0 |
| 1984 | 24 | 0 |
| 1985 | 20 | 0 |
| 1986 | 16 | 0 |
| 1987 | 15 | 0 |
| 1988 | 14 | 0 |
| 1989 | 24 | 0 |
| 1990 | 25 | 0 |
| 1991 | 26 | 0 |
| 1992 | 19 | 0 |
| 1993 | 21 | 0 |
| 1994 | 20 | 0 |
| 1995 | 19 | 0 |
| 1996 | 21 | 0 |
| 1997 | 14 | 0 |
| 1998 | 19 | 0 |
| 1999 | 34 | 0 |
| 2000 | 16 | 0 |
| 2001 | 16 | 5 |
| 2002 | 16 | 21 |
| 2003 | 22 | 15 |
| 2004 | 13 | 22 |
| 2005 | 12 | 15 |
| 2006 | 9 | 22 |
| 2007 | 6 | 19 |
| 2008 | 5 | 18 |
| 2009 | 12 | 27 |
| 2010 | 7 | 27 |
| 2011 | 15 | 25 |
| 2012 | 12 | 16 |
| 2013 | 10 | 16 |
| 2014 | 25 | 16 |
| 2015 | 16 | 26 |
| 2016 | 17 | 12 |
| 2017 | 15 | 28 |
| 2018 | 18 | 21 |
| 2019 | 29 | 30 |
| 2020 | 20 | 34 |
| 2021 | 22 | 21 |
| 2022 | 24 | 35 |
| 2023 | 24 | 27 |
| 2024 | 14 | 19 |
| 2025 | 15 | 17 |
| 2026 | 16 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 2227/36Spark ignitionIndexing code255
- F23N 2227/02Starting or ignition cyclesIndexing code191
- F23N 2227/22Pilot burnersIndexing code162
- F23N 2227/28Ignition circuitsIndexing code150
- F23N 2227/12Burner simulation or checkingIndexing code134
- F23N 2227/04PrepurgeIndexing code111
- F23N 2227/20Calibrating devicesIndexing code75
- F23N 2227/42Ceramic glow ignitionIndexing code67
All 16 subgroupsShow fewer
- F23N 2227/10Sequential burner runningIndexing code66
- F23N 2227/38Electrical resistance ignitionIndexing code62
- F23N 2227/06PostpurgeIndexing code48
- F23N 2227/32Igniting for a predetermined number of cyclesIndexing code45
- F23N 2227/18Applying test signalsIndexing code13
- F23N 2227/34Continuously applied ignition cyclesIndexing code7
- F23N 2227/40Catalytic ignitionIndexing code5
- F23N 2227/08Hold fire apparatusIndexing code2
Recent patents
- Systems and methods for automated furnace inducer sensor output verification22 Sep 2026US 12,742,548 B2Rheem Manufacturing Company
- Method of starting a burner device and heating device having a burner device1 Sep 2026US 12,723,757 B2Truma Geraetetechnik GmbH & Co. KG
- Systems and methods for fuel selection for combustion devices7 Jul 2026US 12,674,577 B2Rheem Manufacturing Company
- Method and controller for operating a gas burner appliance19 May 2026US 12,631,331 B2Pittway Sarl
- Ignition-based protocols for pellet grills19 May 2026US 12,631,336 B2
- Device for delivering a gaseous mixture, corresponding delivery apparatus and corresponding method of use3 Sep 2026US 2026/0258947 A1Sit S.P.A.
- Gas ignition system for a gas cooking appliance23 Jul 2026US 2026/0210558 A1Haier US Appliance Solutions, Inc.
- Method for starting the combustion operation of a fuel-powered vehicle heater25 Jun 2026US 2026/0175646 A1Eberspächer Climate Control Systems GmbH & Co. KG
- Temperature control system for hot surface igniter21 May 2026US 2026/0139835 A1Chongqing Le-Mark Technology Co
- Combustion device and hot water device including same5 Mar 2026US 2026/0063330 A1Noritz Corporation
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
- Self-diagnostic flame rectification sensing circuit and method therefor123US 5,506,569 ATexas Instruments Incorporated · 1996