- All sections
- C - Chemistrymetallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 11/122 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Patent holdings for IPC class C02F 11/122
Total number of patents in this class: 161
10-year publication summary
|
2
|
12
|
14
|
19
|
14
|
25
|
25
|
20
|
23
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Veolia Water Solutions & Technologies Support | 533 |
9 |
| Beijing Drainage Group Co., Ltd | 26 |
5 |
| Georgia Tech Research Corporation | 2906 |
4 |
| Duke University | 3170 |
4 |
| Evoqua Water Technologies LLC | 930 |
3 |
| Graymont Western Canada Inc. | 50 |
3 |
| Synata bio, Inc. | 77 |
3 |
| Dredge Spoils Reclamation, LLC | 3 |
3 |
| Samsung Electronics Co., Ltd. | 154751 |
2 |
| BCR Environmental Corporation | 25 |
2 |
| China University of Mining and Technology | 1292 |
2 |
| Kemira Oyj | 1241 |
2 |
| MERRELL BROS., Inc. | 3 |
2 |
| Orege | 39 |
2 |
| Process Wastewater Technologies, LLC | 12 |
2 |
| Solenis Technologies, L.P. | 305 |
2 |
| Suez International | 365 |
2 |
| Tongji University | 583 |
2 |
| UPM-Kymmene Corporation | 980 |
2 |
| Shanghai Techase Environment Protection Co., Ltd. | 3 |
2 |
| Other owners | 103 |