CPC Main Group Additional Only
C02F 2305/00 Use of specific compounds during water treatment
7 direct subcodes
Child Classifications
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- C02F 2305/02 Specific form of oxidant
- C02F 2305/04 Surfactants, used as part of a formulation or alone
- C02F 2305/06 Nutrients for stimulating the growth of microorganisms
- C02F 2305/08 Nanoparticles or nanotubes
- C02F 2305/10 Photocatalysts
- C02F 2305/12 Inert solids used as ballast for improving sedimentation (C02F3/1226 takes precedence)
- C02F 2305/14 Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature
Top Applicants
Top 10 applicants by patent filingsfor class C02, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 2,531
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 1,700
- KURITA WATER IND JP 1,287
- TONGJI UNIVERSITY 1,040
- CHANGZHOU UNIVERSITY 928
- ECOLAB US 904
- HARBIN INSTITUTE OF TECHNOLOGY 904
- BEIJING UNIVERSITY OF TECHNOLOGY 878
- HOHAI UNIVERSITY 862
- EVOQUA WATER TECHNOLOGIES US 842