F23R 3/50 Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52)
Introduced: January 1980
Title
Titles differ between systems:
IPC: Combustion chambers comprising an annular flame tube within an annular casing
CPC: Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52)
Full Title
Full titles differ between systems:
Continuous combustion chambers using liquid or gaseous fuel > characterised by the arrangement or form of the flame tubes or combustion chambers > Combustion chambers comprising an annular flame tube within an annular casing
Continuous combustion chambers using liquid or gaseous fuel > characterised by the arrangement or form of the flame tubes or combustion chambers > Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52)
No child classifications to compare. This is a leaf node in both 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