DIFF Main Group
F23J 11/00 Devices for conducting smoke or fumes, e.g. flues (chimney stacks E04H12/28; removing cooking fumes from domestic stoves or ranges F24C15/20 )
Introduced: September 1968
Title
Titles differ between systems:
IPC: Devices for conducting smoke or fumes, e.g. flues
CPC: Devices for conducting smoke or fumes, e.g. flues (chimney stacks E04H12/28; removing cooking fumes from domestic stoves or ranges F24C15/20 )
Full Title
Full titles differ between systems:
IPC:
Devices for conducting smoke or fumes, e.g. flues
CPC:
Devices for conducting smoke or fumes, e.g. flues (chimney stacks E04H12/28; removing cooking fumes from domestic stoves or ranges F24C15/20 )
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
Child Classifications
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- F23J 11/02 for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages IPC+CPC Available in IPC and CPC
- F23J 11/10 for tents; for log huts; for other inflammable structures IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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