Technology Topic
Water Treatment Patent Classification
Water technology concentrates in C02F: treatment of water, waste water, sewage and sludge. Membrane filtration, desalination pre-treatment, biological treatment and disinfection all classify here.
Emerging filings target micropollutants and PFAS removal, water reuse and the energy footprint of treatment plants.
The classification codes that matter
C02F 678,287 filings 2013–2023
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Water, waste-water and sludge treatment: membranes, biology, oxidation and disinfection.
2018 → 2023: 70,645 → 70,835 filings (+0 %)
Who files here: top applicants
- 1 CHINESE ACADEMY OF SCIENCES 3,734
- 2 SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,761
- 3 MIDEA 1,938
- 4 TONGJI UNIVERSITY 1,433
- 5 HARBIN INSTITUTE OF TECHNOLOGY 1,380
IPC filings 2013–2023, aggregated across the codes above. Source: EPO PATSTAT.
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