- 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: 3748
10-year publication summary
|
346
|
274
|
322
|
300
|
332
|
237
|
203
|
264
|
282
|
162
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1258 |
104 |
| Ecolab USA Inc. | 5796 |
76 |
| Veolia Water Solutions & Technologies Support | 533 |
74 |
| Kurita Water Industries Ltd. | 1283 |
70 |
| Evoqua Water Technologies LLC | 930 |
66 |
| Saudi Arabian Oil Company | 14235 |
34 |
| Veolia Water Technologies, Inc. | 81 |
27 |
| General Electric Company | 13899 |
26 |
| SunCor Energy Inc. | 734 |
25 |
| Gradiant Corporation | 147 |
24 |
| Mitsubishi Heavy Industries, Ltd. | 9128 |
22 |
| ChemTreat, Inc. | 282 |
22 |
| Nanjing University | 799 |
21 |
| Unilever PLC | 2999 |
20 |
| Unilever N.V. | 2913 |
20 |
| Nalco Company | 536 |
20 |
| BL Technologies, Inc. | 843 |
19 |
| Suez International | 366 |
18 |
| Graymont Western Canada Inc. | 54 |
17 |
| Metawater Co., Ltd. | 200 |
17 |
| Other owners | 3026 |