F23D 14/725
Protection against flame failure by using flame detection devices
Official title: {Protection against flame failure by using flame detection devices (pilot flame igniters with interlock with main fuel supply F23Q9/08)}
F23D14/725 (Protection against flame failure by using flame detection devices) appears on 86 US grants and 71 published applications in this corpus.
Search patents in F23D- Granted patents
- 86
- Published applications
- 71
- Assignees
- 83
- Inventors
- 250
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 1 | 4 |
| 2002 | 4 | 4 |
| 2003 | 4 | 4 |
| 2004 | 3 | 3 |
| 2005 | 1 | 5 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 4 |
| 2012 | 0 | 3 |
| 2013 | 2 | 4 |
| 2014 | 2 | 2 |
| 2015 | 1 | 3 |
| 2016 | 2 | 2 |
| 2017 | 1 | 0 |
| 2018 | 3 | 2 |
| 2019 | 3 | 3 |
| 2020 | 2 | 6 |
| 2021 | 4 | 4 |
| 2022 | 4 | 4 |
| 2023 | 4 | 2 |
| 2024 | 0 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flameout protection system and heater24 Feb 2026US 12,560,332 B2Shinerich Industrial Ltd.
- Flame detection and ignition device4 Feb 2025US 12,215,860 B2John Zink Company
- Outdoor portable gas stove21 Nov 2023US 11,821,636 B2Haohong Electric Technology (Hubei) Co., Ltd.
- Flame sensor assemblies and methods of replacing flame sensor assemblies9 May 2023US 11,644,196 B2Emerson Electric Co.
- Single-piece refractory for a water heating assembly2 May 2023US 11,639,792 B2Rheem Manufacturing Company
- A burner apparatus for a gas appliance, a gas appliance and a manufacturing method30 Jul 2026US 2026/0218897 A1Finsteam AB Oy
- Heating and cooking apparatus5 Feb 2026US 2026/0033670 A1Rinnai Corporation
- High pressure naturally aspirated tube heater7 Aug 2025US 2025/0251127 A1L. B. White Company, Inc.
- Reactor for partial oxidation of hydrocarbons29 Aug 2024US 2024/0286896 A1Casale SA
- Flameout protection system and heater4 Jul 2024US 2024/0219034 A1Shinerich Industrial Ltd.
Most cited
By later US patents
- Constant current flame ionization circuit109US 6,509,838 B12003
- Combustion burner for a water heater87US 6,036,480 AAOS Holding Company · 2000
- Gaseous fuel burner77US 7,934,926 B2DEKA Products Limited Partnership · 2011
- System and method for detecting flame rollout in a furnace59US 6,572,363 B1Carrier Corporation · 2003
- Ignition inhibiting gas water heater49US 5,797,355 ASRP 687 Pty. Ltd. · 1998