F23Q IGNITION (devices or installations peculiar to internal-combustion engines F02P; of cigarettes or tobacco A24F; compositions therefor, chemical igniters C06C); EXTINGUISHING-DEVICES
Introduced: September 1968
Description
Ignition and extinguishing devices for combustion apparatus, including spark plugs, igniters, pilot lights, and flame-initiation systems used in furnaces, boilers, engines, and other combustion equipment. Also covers fire suppression and extinguishing mechanisms integrated with combustion installations, as well as control systems for managing combustion startup and shutdown sequences. This subclass excludes general electrical ignition apparatus (covered in H05) and standalone fire-fighting equipment not directly associated with combustion apparatus.
Title
Titles differ between systems:
IPC: IGNITION; EXTINGUISHING DEVICES
CPC: IGNITION (devices or installations peculiar to internal-combustion engines F02P; of cigarettes or tobacco A24F; compositions therefor, chemical igniters C06C); EXTINGUISHING-DEVICES
Full Title
Full titles differ between systems:
IGNITION; EXTINGUISHING DEVICES
IGNITION (devices or installations peculiar to internal-combustion engines F02P; of cigarettes or tobacco A24F; compositions therefor, chemical igniters C06C); EXTINGUISHING-DEVICES
Additional Content IPC
Glossary
Pilot flame A small flame that is lit or kept alight in order to provide ignition to a more powerful burner. Retention flame A small flame that is kept alight in order to maintain the uninterrupted operation of a more powerful burner. Fire lighter An element that either consists of combustible material or absorbs liquid fuel, and is intended for use in a fire-place or the like for simplifying the ignition of solid fuel.
Limiting references
Devices for igniting matches Hand fire extinguishers Chemical igniters, e.g. catalytic igniters Flints Matches Fire-lighters Candles with incorporated means (e.g. impregnated wicks) for self-extinguishing
Application references
Cigars or cigarettes with lighting devices Extinguishing devices for cigars or cigarettes , e.g. , Combinations of lighters and smokers requisites , e.g. , , Time-controlled igniting mechanisms for cooking-vessels Charcoal igniting devices for barbecues or the like Fire extinguishing specially adapted for particular objects or places Arrangements for igniting thermal or catalytic exhaust converters Ignition of light sources using charges of combustible material Arrangement or mounting of ignition devices in stoves or ranges for gaseous fuel Arrangement or mounting of ignition devices in stoves or ranges for liquid fuel
IPC and CPC are identically structured here. All 11 subcodes exist in both systems.
9 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F23Q 1/00 Mechanical igniters (lighters containing fuel F23Q2/00; matches C06F) IPC+CPC Available in IPC and CPC
- F23Q 11/00 Arrangement of catalytic igniters (catalytic igniters per se C06C) IPC+CPC Available in IPC and CPC
- F23Q 23/00 Testing of ignition installations (peculiar to internal-combustion engines F02P17/00) IPC+CPC Available in IPC and CPC
- F23Q 25/00 Extinguishing-devices, e.g. for blowing-out or snuffing candle flames (for cigarettes A24F) IPC+CPC Available in IPC and CPC
- F23Q 3/00 Igniters using electrically-produced sparks (sparking-plugs H01T13/00) +4 CPC IPC+CPC Available in IPC and CPC
- F23Q 5/00 Make-and-break ignition, i.e. with spark generated between electrodes by breaking contact therebetween (specially adapted for internal-combustion engines F02P15/00) IPC+CPC Available in IPC and CPC
- F23Q 7/00 Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes (circuits therefor H01T15/00); Electrically-heated glowing plugs +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F23,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,124
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
- NINGBO FOTILE KITCHENWARE COMPANY 1,363
- SIEMENS DE 997
- UNITED TECHNOLOGIES CORPORATION (UTC) US 937
- GE (GENERAL ELECTRIC COMPANY) 898
- VATTI 815
- CHINESE ACADEMY OF SCIENCES 719
- RINNAI COMPANY 708
- MITSUBISHI HITACHI POWER SYSTEMS 670
Top Applicants (CPC)
Class F23,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,581
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
- SIEMENS DE 1,157
- GE (GENERAL ELECTRIC COMPANY) 994
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
- MITSUBISHI HEAVY INDUSTRIES JP 701
- MITSUBISHI HITACHI POWER SYSTEMS JP 695
- RAYTHEON TECHNOLOGIES CORPORATION US 587
- NINGBO FOTILE KITCHENWARE COMPANY 543
- GENERAL ELECTRIC TECHNOLOGY CH 490