CPC Subgroup Additional Only
C04B 2235/3852 Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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 and secondary phases not being of a fibrous nature > Non-oxide ceramic constituents or additives > Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
5 direct subcodes
Child Classifications
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- C04B 2235/3856 Carbonitrides, e.g. titanium carbonitride, zirconium carbonitride
- C04B 2235/386 Boron nitrides
- C04B 2235/3865 Aluminium nitrides
- C04B 2235/3873 Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
- C04B 2235/3886 Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride
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