- All sections
- C - Chemistrymetallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 3/22 - Activated sludge processes using circulation pipes
Patent holdings for IPC class C02F 3/22
Total number of patents in this class: 135
10-year publication summary
|
13
|
15
|
18
|
13
|
9
|
11
|
13
|
9
|
6
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Oxymem Limited | 21 |
8 |
| Paques I.P. B.V. | 67 |
6 |
| Searen, LLC | 8 |
5 |
| Absolute Aeration | 7 |
4 |
| Novideas S.r.l. | 5 |
4 |
| Aqua-Aerobic Systems, Inc. | 88 |
3 |
| Suez International | 335 |
3 |
| Aquanos Energy Ltd. | 2 |
2 |
| BKT Co., Ltd. | 67 |
2 |
| H.C. Development S.r.l. | 2 |
2 |
| Kubota Corporation | 3883 |
2 |
| Pulsed Burst Systems, LLC | 5 |
2 |
| Tangent Company LLC | 16 |
2 |
| ThyssenKrupp AG | 3279 |
2 |
| ThyssenKrupp Industrial Solutions AG | 632 |
2 |
| Zenon Technology Partnership | 37 |
2 |
| Laguna Innovation Ltd. | 2 |
2 |
| General Electric Company | 13811 |
1 |
| Siemens AG | 24520 |
1 |
| Mitsubishi Heavy Industries, Ltd. | 8694 |
1 |
| Other owners | 79 |