CPC Subgroup
C02F 11/14 with addition of chemical agents
Full Title
Treatment of sludge; Devices therefor > by de-watering, drying or thickening > with addition of chemical agents
3 direct subcodes
Child Classifications
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- C02F 11/143 using inorganic substances (C02F11/148 takes precedence)
- C02F 11/147 using organic substances (C02F11/148 takes precedence)
- C02F 11/148 Combined use of inorganic and organic substances, being added in the same treatment step
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