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PCE
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Search for IPC and CPC classification codes or keywords
CPC Subgroup
C02F 11/147

using organic substances (C02F11/148 takes precedence)

Full Title

Treatment of sludge; Devices therefor > by de-watering, drying or thickening > with addition of chemical agents > using organic substances (C02F11/148 takes precedence)

Top Applicants

Top 10 applicants by patent filingsfor class C02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 2,531
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 1,700
  3. KURITA WATER IND JP 1,287
  4. TONGJI UNIVERSITY 1,040
  5. CHANGZHOU UNIVERSITY 928
  6. ECOLAB US 904
  7. HARBIN INSTITUTE OF TECHNOLOGY 904
  8. BEIJING UNIVERSITY OF TECHNOLOGY 878
  9. HOHAI UNIVERSITY 862
  10. EVOQUA WATER TECHNOLOGIES US 842