CPC Subgroup Additional Only
C04B 2237/36 Non-oxidic
Full Title
Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating > Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates > Ceramic > Non-oxidic
5 direct subcodes
Child Classifications
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- C04B 2237/361 Boron nitride
- C04B 2237/363 Carbon
- C04B 2237/365 Silicon carbide
- C04B 2237/366 Aluminium nitride
- C04B 2237/368 Silicon 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