CPC Subgroup Additional Only
C04B 2235/50 Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
Full Title
Aspects relating to ceramic starting mixtures or sintered ceramic products > Composition of constituents of the starting material or of secondary phases of the final product > Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
2 direct subcodes
Child Classifications
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- C04B 2235/52 Constituents or additives characterised by their shapes
- C04B 2235/54 Particle size related information
Top Applicants
Top 10 applicants by patent filingsfor class C04, 2013–2023, worldwide · Source: EPO PATSTAT
- HALLIBURTON ENERGY SERVICES GROUP US 2,158
- CHINESE ACADEMY OF SCIENCES 1,569
- NGK INSULATORS JP 1,504
- SIKA TECHNOLOGY CH 1,181
- CORNING US 974
- WUHAN UNIVERSITY OF TECHNOLOGY 926
- UNITED STATES GYPSUM COMPANY US 882
- GE (GENERAL ELECTRIC COMPANY) US 828
- MITSUBISHI MATERIALS CORPORATION JP 792
- SAUDI ARABIAN OIL COMPANY SA 686