CPC Main Group Additional Only
F23R 2900/00 Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
Filing statistics
CPC F23R 2900/00 belongs to the parent subclass F23R, which recorded 18,438 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,081 in 2013 to 1,384 in 2023 (-33%), peaking at 2,105 applications in 2014. The most active applicants in class F23 are GE (GENERAL ELECTRIC COMPANY) (2,581 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (1,180 applications) and SIEMENS (1,157 applications).
Source: EPO PATSTAT, worldwide filings
25 direct subcodes
Child Classifications
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- F23R 2900/00001 Arrangements using bellows, e.g. to adjust volumes or reduce thermal stresses
- F23R 2900/00002 Gas turbine combustors adapted for fuels having low heating value [LHV]
- F23R 2900/00004 Preventing formation of deposits on surfaces of gas turbine components, e.g. coke deposits
- F23R 2900/00005 Preventing fatigue failures or reducing mechanical stress in gas turbine components
- F23R 2900/00006 Using laser for starting or improving the combustion process
- F23R 2900/00008 Combustion techniques using plasma gas
- F23R 2900/00009 Using plasma torches for igniting, stabilizing, or improving the combustion process
- F23R 2900/00012 Details of sealing devices
- F23R 2900/00013 Reducing thermo-acoustic vibrations by active means
- F23R 2900/00014 Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators
- F23R 2900/00015 Trapped vortex combustion chambers
- F23R 2900/00016 Retrofitting in general, e.g. to respect new regulations on pollution
- F23R 2900/00017 Assembling combustion chamber liners or subparts
- F23R 2900/00018 Manufacturing combustion chamber liners or subparts
- F23R 2900/00019 Repairing or maintaining combustion chamber liners or subparts
- F23R 2900/03041 Effusion cooled combustion chamber walls or domes
- F23R 2900/03042 Film cooled combustion chamber walls or domes
- F23R 2900/03043 Convection cooled combustion chamber walls with means for guiding the cooling air flow
- F23R 2900/03044 Impingement cooled combustion chamber walls or subassemblies
- F23R 2900/03045 Convection cooled combustion chamber walls provided with turbolators or means for creating turbulences to increase cooling
Top Applicants
Top 10 applicants by patent filingsfor 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