CPC Subgroup Additional Only
C04B 2235/32 Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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 > Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
16 direct subcodes
Child Classifications
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- C04B 2235/3201 Alkali metal oxides or oxide-forming salts thereof
- C04B 2235/3205 Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B 2235/3217 Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B 2235/3224 Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B 2235/3231 Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B 2235/3262 Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B 2235/327 Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B 2235/3281 Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
- C04B 2235/3284 Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
- C04B 2235/3286 Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
- C04B 2235/3287 Germanium oxides, germanates or oxide forming salts thereof, e.g. copper germanate
- C04B 2235/3289 Noble metal oxides
- C04B 2235/3293 Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
- C04B 2235/3294 Antimony oxides, antimonates, antimonites or oxide forming salts thereof, indium antimonate
- C04B 2235/3296 Lead oxides, plumbates or oxide forming salts thereof, e.g. silver plumbate
- C04B 2235/3298 Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
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