CPC Subgroup
F22B 37/10 Water tubes; Accessories therefor
Full Title
Component parts or details of steam boilers > applicable to more than one kind or type of steam boiler > Water tubes; Accessories therefor
10 direct subcodes
Child Classifications
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- F22B 37/12 Forms of water tubes, e.g. of varying cross-section
- F22B 37/14 Supply mains, e.g. rising mains, down-comers, in connection with water tubes
- F22B 37/16 Return bends
- F22B 37/18 Inserts, e.g. for receiving deposits from water
- F22B 37/20 Supporting arrangements, e.g. for securing water-tube sets
Top Applicants
Top 10 applicants by patent filingsfor class F22, 2013–2023, worldwide · Source: EPO PATSTAT
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 544
- SIEMENS DE 306
- PHILIP MORRIS PRODUCTS CH 258
- GENERAL ELECTRIC TECHNOLOGY CH 254
- MITSUBISHI HITACHI POWER SYSTEMS JP 235
- XIAN JIAOTONG UNIVERSITY 214
- MITSUBISHI HEAVY INDUSTRIES JP 195
- MITSUBISHI HITACHI POWER SYSTEMS 169
- HARBIN BOILER COMPANY 166
- VALMET TECHNOLOGIES FI 155