CPC Subgroup Additional Only
C04B 2235/52 Constituents or additives characterised by their shapes
Full Title
Aspects relating to ceramic starting mixtures or sintered ceramic products > Composition of constituents of the starting material or of secondary phases of the final product > Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance > Constituents or additives characterised by their shapes
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C04B 2235/5204 Monocrystalline powders
- C04B 2235/5208 Fibers
- C04B 2235/5276 Whiskers, spindles, needles or pins
- C04B 2235/528 Spheres
- C04B 2235/5284 Hollow fibers, e.g. nanotubes
- C04B 2235/5292 Flakes, platelets or plates
- C04B 2235/5296 with a defined aspect ratio, e.g. indicating sphericity
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