Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Main Group Additional Only
C02F 2303/00

Specific treatment goals

Filing statistics

CPC C02F 2303/00 belongs to the parent subclass C02F, which recorded 316,465 patent applications worldwide between 2013 and 2023. Annual filings grew from 12,795 in 2013 to 28,600 in 2023 (+124%), peaking at 39,882 applications in 2018. The most active applicants in class C02 are CHINESE ACADEMY OF SCIENCES (2,531 applications), SINOPEC (CHINA PETROCHEMICAL CORPORATION) (1,700 applications) and KURITA WATER IND (1,287 applications).

Source: EPO PATSTAT, worldwide filings

13 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • C02F 2303/02 Odour removal or prevention of malodour
  • C02F 2303/04 Disinfection
  • C02F 2303/06 Sludge reduction, e.g. by lysis
  • C02F 2303/08 Corrosion inhibition
  • C02F 2303/10 Energy recovery
  • C02F 2303/12 Prevention of foaming
  • C02F 2303/14 Maintenance of water treatment installations
  • C02F 2303/16 Regeneration of sorbents, filters
  • C02F 2303/20 Prevention of biofouling
  • C02F 2303/22 Eliminating or preventing deposits, scale removal, scale prevention (C02F1/042, C02F1/4602, C02F5/00 take precedence)
  • C02F 2303/24 Separation of coarse particles, e.g. by using sieves or screens
  • C02F 2303/26 Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

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