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CPC Main Group Additional Only
C02F 2305/00

Use of specific compounds during water treatment

7 direct subcodes

Child Classifications

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  • C02F 2305/04 Surfactants, used as part of a formulation or alone
  • C02F 2305/06 Nutrients for stimulating the growth of microorganisms
  • C02F 2305/08 Nanoparticles or nanotubes
  • C02F 2305/10 Photocatalysts
  • C02F 2305/12 Inert solids used as ballast for improving sedimentation (C02F3/1226 takes precedence)
  • C02F 2305/14 Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature

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