CPC Subgroup Additional Only
F23G 2202/10 in two or more stages
Full Title
Combustion > in two or more stages
6 direct subcodes
Child Classifications
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- F23G 2202/101 with controlled oxidant supply
- F23G 2202/102 with supplementary heating
- F23G 2202/103 in separate chambers
- F23G 2202/104 with ash melting stage
- F23G 2202/105 with waste supply in stages
- F23G 2202/106 with recirculation of unburned solid or gaseous matter into combustion chamber
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