Aspects relating to ceramic starting mixtures or sintered ceramic products

Filing statistics

CPC C04B 2235/00 belongs to the parent subclass C04B, which recorded 228,252 patent applications worldwide between 2013 and 2023. Annual filings grew from 10,861 in 2013 to 20,066 in 2023 (+85%), peaking at 27,356 applications in 2018. The most active applicants in class C04 are HALLIBURTON ENERGY SERVICES GROUP (2,158 applications), CHINESE ACADEMY OF SCIENCES (1,569 applications) and NGK INSULATORS (1,504 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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C04B 2235/02 Composition of constituents of the starting material or of secondary phases of the final product
C04B 2235/60 Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
C04B 2235/65 Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
C04B 2235/70 Aspects relating to sintered or melt-casted ceramic products

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