CPC Main Group Additional Only
F23J 2219/00 Treatment devices
8 direct subcodes
Child Classifications
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- F23J 2219/10 Catalytic reduction devices
- F23J 2219/20 Non-catalytic reduction devices
- F23J 2219/30 Sorption devices using carbon, e.g. coke
- F23J 2219/40 Sorption with wet devices, e.g. scrubbers
- F23J 2219/50 Sorption with semi-dry devices, e.g. with slurries
- F23J 2219/60 Sorption with dry devices, e.g. beds
- F23J 2219/70 Condensing contaminants with coolers
- F23J 2219/80 Quenching
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