CPC Subgroup Additional Only
C04B 2237/58 Forming a gradient in composition or in properties across the laminate or the joined articles
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 > Forming a gradient in composition or in properties across the laminate or the joined articles
3 direct subcodes
Child Classifications
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- C04B 2237/582 by joining layers or articles of the same composition but having different additives
- C04B 2237/586 by joining layers or articles of the same composition but having different densities
- C04B 2237/588 by joining layers or articles of the same composition but having different particle or grain sizes
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