DIFF Main Group
C04B 28/00 Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
Introduced: January 1985
Of 12 combined children, 8 exist in both systems.
4 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
Navigate with arrow keys, Enter to open
- C04B 28/02 containing hydraulic cements other than calcium sulfates since 1985 +5 CPC IPC+CPC Available in IPC and CPC
- C04B 28/18 containing mixtures of the silica-lime type since 1985 +3 CPC −2 IPC IPC+CPC Available in IPC and CPC
- C04B 28/24 containing alkyl, ammonium or metal silicates; containing silica sols since 1985 IPC+CPC Available in IPC and CPC
- C04B 28/28 containing organic polyacids, e.g. polycarboxylate cements since 1985 IPC+CPC Available in IPC and CPC
- C04B 28/30 containing magnesium cements (magnesium oxide cements C04B28/10) since 1985 IPC+CPC Available in IPC and CPC
- C04B 28/36 containing sulfur, sulfides or selenium since 1985 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C04,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 2,095
- WUHAN UNIVERSITY OF TECHNOLOGY 1,205
- NGK INSULATORS JP 1,133
- HALLIBURTON ENERGY SERVICES GROUP US 1,049
- SIKA TECHNOLOGY CH 1,041
- GUILIN UNIVERSITY OF TECHNOLOGY 807
- WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
- SOUTHEAST UNIVERSITY 801
- CORNING US 777
- UNITED STATES GYPSUM COMPANY US 739
Top Applicants (CPC)
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