DIFF Main Group
F23D 11/00 Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
Introduced: September 1968
Of 10 combined children, 7 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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- F23D 11/02 the combustion space being a chamber substantially at atmospheric pressure IPC+CPC Available in IPC and CPC
- F23D 11/04 the spraying action being obtained by centrifugal action IPC+CPC Available in IPC and CPC
- F23D 11/10 the spraying being induced by a gaseous medium, e.g. water vapour +3 CPC IPC+CPC Available in IPC and CPC
- F23D 11/24 by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space 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