IPC Subgroup
F23B 90/04 including secondary combustion
Introduced: January 2011
Full Title
Combustion methods not related to a particular type of apparatus > including secondary combustion
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION APPARATUS; COMBUSTION PROCESSES
- Subclass:
- METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
Additional Content
Combustion apparatus including separate secondary combustion chambers
2 direct subcodes
Child Classifications
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- F23B 90/06 the primary combustion being a gasification or pyrolysis in a reductive atmosphere
- F23B 90/08 in the presence of catalytic material
Top Applicants
Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,124
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
- NINGBO FOTILE KITCHENWARE COMPANY 1,363
- SIEMENS DE 997
- UNITED TECHNOLOGIES CORPORATION (UTC) US 937
- GE (GENERAL ELECTRIC COMPANY) 898
- VATTI 815
- CHINESE ACADEMY OF SCIENCES 719
- RINNAI COMPANY 708
- MITSUBISHI HITACHI POWER SYSTEMS 670