CPC Main Group
F23B 90/00 Combustion methods not related to a particular type of apparatus
Filing statistics
CPC F23B 90/00 belongs to the parent subclass F23B, which recorded 4,863 patent applications worldwide between 2013 and 2023. Annual filings declined from 372 in 2013 to 320 in 2023 (-14%), peaking at 596 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
2 direct subcodes
Child Classifications
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- F23B 90/02 Start-up techniques
- F23B 90/04 including secondary combustion (in separate combustion chambers F23B10/02)
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