CPC Subgroup Additional Only
C02F 2201/78 Details relating to ozone treatment devices
Full Title
Apparatus for treatment of water, waste water or sewage > Details relating to ozone treatment devices
2 direct subcodes
Child Classifications
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- C02F 2201/782 Ozone generators
- C02F 2201/784 Diffusers or nozzles for ozonation
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