CPC Main Group Additional Only
F23N 2237/00 Controlling
Filing statistics
CPC F23N 2237/00 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
12 direct subcodes
Child Classifications
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- F23N 2237/02 two or more burners
- F23N 2237/04 at two or more different localities
- F23N 2237/06 two predeterming temperatures, e.g. day-night
- F23N 2237/08 two or more different types of fuel simultaneously
- F23N 2237/10 High or low fire
- F23N 2237/12 catalytic burners
- F23N 2237/14 burners with gasification or vaporizer elements
- F23N 2237/16 secondary air
- F23N 2237/18 fluidized bed burners
- F23N 2237/20 one or more bypass conduits
- F23N 2237/22 water injection
- F23N 2237/24 height of burner
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