CPC Subgroup Additional Only
C04B 2111/20 Resistance against chemical, physical or biological attack
Full Title
Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use > Resistance against chemical, physical or biological attack
16 direct subcodes
Child Classifications
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- C04B 2111/21 Efflorescence resistance
- C04B 2111/22 Carbonation resistance
- C04B 2111/23 Acid resistance, e.g. against acid air or rain
- C04B 2111/24 Sea water resistance
- C04B 2111/25 Graffiti resistance; Graffiti removing
- C04B 2111/26 Corrosion of reinforcement resistance
- C04B 2111/27 Water resistance, i.e. waterproof or water-repellent materials
- C04B 2111/28 Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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