F23N 5/02
Systems for controlling combustion: using devices responsive to thermal changes or to
Official title: using devices responsive to thermal changes or to thermal expansion of a medium
F23N5/02 (Systems for controlling combustion: using devices responsive to thermal changes or to) appears on 1,565 US grants and 1,091 published applications in this corpus.
Search patents in F23N- Granted patents
- 1,565
- Published applications
- 1,091
- Assignees
- 743
- Inventors
- 2,908
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 46 | 0 |
| 1977 | 39 | 0 |
| 1978 | 35 | 0 |
| 1979 | 20 | 0 |
| 1980 | 24 | 0 |
| 1981 | 23 | 0 |
| 1982 | 16 | 0 |
| 1983 | 31 | 0 |
| 1984 | 29 | 0 |
| 1985 | 29 | 0 |
| 1986 | 26 | 0 |
| 1987 | 29 | 0 |
| 1988 | 26 | 0 |
| 1989 | 32 | 0 |
| 1990 | 26 | 0 |
| 1991 | 32 | 0 |
| 1992 | 26 | 0 |
| 1993 | 30 | 0 |
| 1994 | 26 | 0 |
| 1995 | 25 | 0 |
| 1996 | 27 | 0 |
| 1997 | 21 | 0 |
| 1998 | 32 | 0 |
| 1999 | 42 | 0 |
| 2000 | 34 | 0 |
| 2001 | 28 | 13 |
| 2002 | 31 | 31 |
| 2003 | 23 | 19 |
| 2004 | 21 | 33 |
| 2005 | 10 | 32 |
| 2006 | 22 | 39 |
| 2007 | 22 | 45 |
| 2008 | 19 | 27 |
| 2009 | 18 | 45 |
| 2010 | 20 | 56 |
| 2011 | 24 | 46 |
| 2012 | 30 | 43 |
| 2013 | 39 | 39 |
| 2014 | 41 | 50 |
| 2015 | 33 | 49 |
| 2016 | 47 | 67 |
| 2017 | 54 | 54 |
| 2018 | 48 | 50 |
| 2019 | 54 | 61 |
| 2020 | 45 | 61 |
| 2021 | 43 | 53 |
| 2022 | 40 | 46 |
| 2023 | 43 | 45 |
| 2024 | 31 | 46 |
| 2025 | 35 | 24 |
| 2026 | 18 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 5/08Using light-sensitive elements512
- F23N 5/10Using thermocouples391
- F23N 5/12Using ionisation-sensitive elements, i.e. flame rods346
- F23N 5/022Using electronic means207
- F23N 5/14Using thermo-sensitive resistors54
- F23N 5/06Using bellows40
- F23N 5/04Using bimetallic elements35
- F23N 5/025Using electrical or electromechanical means30
All 9 subgroupsShow fewer
Recent patents
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- Flame monitoring device for a gas burner appliance and gas burner appliance16 Jun 2026US 12,655,974 B2Pittway Sarl
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- Fuel cell system20 Aug 2026US 2026/0245925 A1Aisin Corporation
- Burner assembly for an appliance30 Jul 2026US 2026/0215620 A1North Atlantic Imports, LLC
- Combustor, combustor system, and gas turbine30 Jul 2026US 2026/0218908 A1Mitsubishi Heavy Industries, Ltd.
- Enhanced sensors for heating operations16 Jul 2026US 2026/0202332 A1
- Solid Fuel Combustion Apparatus and Method18 Jun 2026US 2026/0168667 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Method and apparatus for automatically transmitting temperature information to a thermostat220US 6,513,723 B1Emerson Electric Co. · 2003
- Fiber optic linked flame sensor206US 5,828,797 AMeggitt Avionics, Inc. · 1998
- Thermostat display system providing animated icons139US 7,455,240 B2Ranco Incorporated of Delaware · 2008
- Burner ignition system132US 4,717,333 AAdvanced Mechanical Technology, Inc. · 1988
- Variable heat generating method and apparatus129US 4,622,007 AAmerican Combustion, Inc. · 1986