F23N REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)
Introduced: September 1968
Description
F23N covers devices and methods for regulating and controlling combustion processes in furnaces, boilers, burners, and other combustion apparatus. The classification includes fuel supply control systems, air/oxygen supply regulation, flame monitoring and safety devices, and automatic control mechanisms that adjust combustion parameters to maintain stable operation. Typical applications encompass ignition control, fuel flow modulation, excess air management, and feedback systems for industrial heating equipment. This class excludes the combustion apparatus itself (covered in F23D, F23H) and specific fuel supply systems when not integrated with combustion control (covered in F23K).
Title
Titles differ between systems:
IPC: REGULATING OR CONTROLLING COMBUSTION
CPC: REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)
Full Title
Full titles differ between systems:
REGULATING OR CONTROLLING COMBUSTION
REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)
CPC subdivides this area 5x more granularly than IPC with 12 additional codes.
12 codes are CPC-only extensions.
Note: 12 CPC extensions are marked as secondary classification only.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- F23N 2900/00 Special features of, or arrangements for controlling combustion 2nd only +10 CPC CPC only CPC only
- F23N 3/00 Regulating air supply or draught (conjointly with fuel supply F23N1/00) +3 CPC IPC+CPC Available in IPC and CPC
- F23N 5/00 Systems for controlling combustion (regulating fuel supply F23N1/00, regulating air supply or draught F23N3/00) +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