- 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: 3715
10-year publication summary
|
346
|
274
|
322
|
300
|
332
|
236
|
203
|
263
|
280
|
131
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1246 |
102 |
| Ecolab USA Inc. | 5765 |
76 |
| Veolia Water Solutions & Technologies Support | 532 |
74 |
| Kurita Water Industries Ltd. | 1271 |
69 |
| Evoqua Water Technologies LLC | 930 |
66 |
| Saudi Arabian Oil Company | 13981 |
33 |
| Veolia Water Technologies, Inc. | 81 |
27 |
| General Electric Company | 13854 |
26 |
| SunCor Energy Inc. | 738 |
25 |
| Gradiant Corporation | 147 |
24 |
| Mitsubishi Heavy Industries, Ltd. | 9049 |
22 |
| ChemTreat, Inc. | 271 |
22 |
| Nanjing University | 793 |
21 |
| Unilever PLC | 3030 |
20 |
| Unilever N.V. | 2940 |
20 |
| Nalco Company | 542 |
20 |
| BL Technologies, Inc. | 841 |
19 |
| Metawater Co., Ltd. | 201 |
18 |
| Suez International | 365 |
18 |
| Graymont Western Canada Inc. | 53 |
17 |
| Other owners | 2996 |