CPC Subgroup Additional Only
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
Full Title
Aspects relating to ceramic starting mixtures or sintered ceramic products > Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
4 direct subcodes
Child Classifications
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- C04B 2235/652 Reduction treatment (C04B2235/664 takes precedence)
- C04B 2235/656 characterised by specific heating conditions during heat treatment
- C04B 2235/658 Atmosphere during thermal treatment
- C04B 2235/66 Specific sintering techniques, e.g. centrifugal sintering
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