CPC Main Group
F23D 14/00 Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
Filing statistics
CPC F23D 14/00 belongs to the parent subclass F23D, which recorded 25,989 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,982 in 2013 to 2,106 in 2023 (+6%), peaking at 2,887 applications in 2018. 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
10 direct subcodes
Child Classifications
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- F23D 14/02 Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D 14/12 Radiant burners
- F23D 14/20 Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone (F23D14/38 takes precedence)
- F23D 14/26 with provision for a retention flame (pilot flame igniters F23Q9/00)
- F23D 14/28 in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
- F23D 14/30 Inverted burners, e.g. for illumination
- F23D 14/32 using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air (F23D14/38 takes precedence)
- F23D 14/34 Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
- F23D 14/38 Torches, e.g. for brazing or heating (nozzles F23D14/48)
- F23D 14/46 Details
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