CPC Subgroup Additional Only
C04B 2237/56 Using constraining layers before or during sintering
Full Title
Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating > Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating > Using constraining layers before or during sintering
6 direct subcodes
Child Classifications
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- C04B 2237/561 Constraining layers not covering the whole surface of the layers to be sintered, e.g. constraining layers with holes
- C04B 2237/562 made of alumina or aluminates
- C04B 2237/564 made of glass
- C04B 2237/565 made of refractory metal oxides, e.g. zirconia
- C04B 2237/567 made of metal
- C04B 2237/568 made of non-oxide ceramics
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