CPC Main Group Additional Only
C02F 2209/00 Controlling or monitoring parameters in water treatment
Filing statistics
CPC C02F 2209/00 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
36 direct subcodes
Child Classifications
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- C02F 2209/001 Upstream control, i.e. monitoring for predictive control
- C02F 2209/003 Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
- C02F 2209/005 Processes using a programmable logic controller [PLC]
- C02F 2209/01 Density
- C02F 2209/02 Temperature
- C02F 2209/03 Pressure
- C02F 2209/04 Oxidation reduction potential [ORP]
- C02F 2209/05 Conductivity or salinity
- C02F 2209/06 pH
- C02F 2209/07 Alkalinity
- C02F 2209/08 Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
- C02F 2209/09 Viscosity
- C02F 2209/10 Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
- C02F 2209/11 Turbidity
- C02F 2209/12 Volatile Fatty Acids (VFAs)
- C02F 2209/14 NH3-N
- C02F 2209/15 N03-N
- C02F 2209/16 Total nitrogen (tkN-N)
- C02F 2209/18 PO4-P
- C02F 2209/19 SO4-S
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