CPC Main Group
F23N 3/00 Regulating air supply or draught (conjointly with fuel supply F23N1/00)
Filing statistics
CPC F23N 3/00 belongs to the parent subclass F23N, which recorded 13,537 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,173 in 2013 to 1,139 in 2023 (-3%), peaking at 1,525 applications in 2020. 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
7 direct subcodes
Child Classifications
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- F23N 3/02 Regulating draught by direct pressure operation of single valves or dampers
- F23N 3/04 by operation of single valves or dampers by temperature sensitive elements
- F23N 3/06 by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
- F23N 3/08 by power-assisted systems
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