- All sections
- C - Chemistrymetallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
Patent holdings for IPC class C02F 1/52
Total number of patents in this class: 3465
10-year publication summary
|
293
|
346
|
274
|
322
|
300
|
329
|
231
|
195
|
239
|
151
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1206 |
100 |
| Veolia Water Solutions & Technologies Support | 533 |
74 |
| Ecolab USA Inc. | 5480 |
71 |
| Kurita Water Industries Ltd. | 1194 |
67 |
| Evoqua Water Technologies LLC | 918 |
62 |
| Saudi Arabian Oil Company | 13155 |
30 |
| Veolia Water Technologies, Inc. | 77 |
27 |
| General Electric Company | 13780 |
26 |
| SunCor Energy Inc. | 735 |
24 |
| Mitsubishi Heavy Industries, Ltd. | 8715 |
22 |
| Gradiant Corporation | 130 |
22 |
| Unilever PLC | 3195 |
21 |
| Unilever N.V. | 3103 |
21 |
| Nalco Company | 563 |
20 |
| Nanjing University | 727 |
20 |
| Metawater Co., Ltd. | 194 |
18 |
| BL Technologies, Inc. | 834 |
17 |
| Graymont Western Canada Inc. | 43 |
16 |
| Panasonic Intellectual Property Management Co., Ltd. | 31375 |
15 |
| ChemTreat, Inc. | 226 |
15 |
| Other owners | 2777 |