based on calcium oxide

Introduced: January 1995

Full Title

Full titles differ between systems:

IPC:

Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on oxides > based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite > based on calcium oxide

CPC:

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 > based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite > based on calcium oxide

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class C04,2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 2,095
WUHAN UNIVERSITY OF TECHNOLOGY 1,205
NGK INSULATORS JP 1,133
HALLIBURTON ENERGY SERVICES GROUP US 1,049
SIKA TECHNOLOGY CH 1,041
GUILIN UNIVERSITY OF TECHNOLOGY 807
WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
SOUTHEAST UNIVERSITY 801
CORNING US 777
UNITED STATES GYPSUM COMPANY US 739

Top Applicants (CPC)

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