- All sections
- C - Chemistry; metallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 3/12 - Activated sludge processes
Patent holdings for IPC class C02F 3/12
Total number of patents in this class: 1721
10-year publication summary
|
127
|
136
|
163
|
165
|
124
|
175
|
128
|
132
|
106
|
34
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Evoqua Water Technologies LLC | 904 |
65 |
| Kurita Water Industries Ltd. | 1110 |
45 |
| Veolia Water Solutions & Technologies Support | 547 |
45 |
| Kubota Corporation | 3054 |
38 |
| BL Technologies, Inc. | 831 |
31 |
| Toray Industries, Inc. | 6652 |
26 |
| Suez International | 304 |
24 |
| Mitsubishi Electric Corporation | 43934 |
23 |
| Invent Umwelt-und Verfahrenstechnik AG | 133 |
16 |
| Hitachi, Ltd. | 16452 |
15 |
| Doosan Heavy Industries & Construction Co., Ltd. | 604 |
15 |
| Kemira Oyj | 1167 |
15 |
| HaskoningDHV Nederland B.V. | 73 |
14 |
| Metawater Co., Ltd. | 181 |
14 |
| Organo Corporation | 394 |
14 |
| Praxair Technology, Inc. | 1367 |
13 |
| General Electric Company | 18133 |
12 |
| Anaergia Inc. | 111 |
12 |
| Nanjing University | 646 |
11 |
| BKT Co., Ltd. | 66 |
10 |
| Other owners | 1263 |