- 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: 3788
10-year publication summary
|
346
|
274
|
322
|
300
|
333
|
238
|
204
|
264
|
291
|
196
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1262 |
103 |
| Ecolab USA Inc. | 5831 |
76 |
| Kurita Water Industries Ltd. | 1294 |
75 |
| Veolia Water Solutions & Technologies Support | 532 |
74 |
| Evoqua Water Technologies LLC | 927 |
67 |
| Saudi Arabian Oil Company | 14369 |
34 |
| Veolia Water Technologies, Inc. | 83 |
27 |
| General Electric Company | 13982 |
26 |
| SunCor Energy Inc. | 731 |
25 |
| Gradiant Corporation | 151 |
24 |
| ChemTreat, Inc. | 287 |
23 |
| Mitsubishi Heavy Industries, Ltd. | 9204 |
22 |
| Nanjing University | 809 |
21 |
| Unilever PLC | 2979 |
20 |
| Unilever N.V. | 2893 |
20 |
| Nalco Company | 530 |
20 |
| Usalco, LLC | 42 |
20 |
| BL Technologies, Inc. | 838 |
19 |
| Suez International | 376 |
19 |
| Graymont Western Canada Inc. | 54 |
17 |
| Other owners | 3056 |