CPC Subgroup
C04B 35/01 based on oxide ceramics
Full Title
Shaped ceramic products characterised by their composition ; Ceramics compositions ( containing free metal bonded to carbides, diamond, oxides, borides, nitrides, silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides or sulfides other than as macroscopic reinforcing agents C22C); Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on oxide ceramics
17 direct subcodes
Child Classifications
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- C04B 35/03 based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B 35/08 based on beryllium oxide
- C04B 35/10 based on aluminium oxide
- C04B 35/12 based on chromium oxide (C04B35/047 and C04B35/105 take precedence)
- C04B 35/14 based on silica
- C04B 35/16 based on silicates other than clay
- C04B 35/26 based on ferrites
- C04B 35/42 based on chromites (C04B35/047 and C04B35/105 take precedence)
- C04B 35/44 based on aluminates
- C04B 35/447 based on phosphates
- C04B 35/45 based on copper oxide or solid solutions thereof with other oxides
- C04B 35/453 based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
- C04B 35/46 based on titanium oxides or titanates (containing also zirconium or hafnium oxides, zirconates or hafnates C04B35/49)
- C04B 35/48 based on zirconium or hafnium oxides, zirconates, or hafnates
- C04B 35/495 based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
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