CPC Subgroup
C02F 11/12 by de-watering, drying or thickening
Full Title
Treatment of sludge; Devices therefor > by de-watering, drying or thickening
5 direct subcodes
Child Classifications
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- C02F 11/121 by mechanical de-watering
- C02F 11/13 by heating
- C02F 11/14 with addition of chemical agents
- C02F 11/15 by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves (for the purpose of heating C02F11/131)
- C02F 11/16 using drying or composting beds
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