CPC Subgroup
C02F 11/121 by mechanical de-watering
Full Title
Treatment of sludge; Devices therefor > by de-watering, drying or thickening > by mechanical de-watering
6 direct subcodes
Child Classifications
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- C02F 11/122 using filter presses (C02F11/123 takes precedence)
- C02F 11/123 using belt or band filters
- C02F 11/125 using screw filters
- C02F 11/126 using drum filters
- C02F 11/127 by centrifugation
- C02F 11/128 using batch processes
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