- All sections
- C - Chemistry; metallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 1/38 - Treatment of water, waste water, or sewage by centrifugal separation
Patent holdings for IPC class C02F 1/38
Total number of patents in this class: 743
10-year publication summary
|
61
|
81
|
87
|
89
|
69
|
79
|
69
|
49
|
45
|
19
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qwtip LLC | 54 |
22 |
| Evoqua Water Technologies LLC | 904 |
13 |
| Hayward Industries, Inc. | 669 |
13 |
| Veolia Water Solutions & Technologies Support | 547 |
11 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
9 |
| Smith & Loveless, Inc. | 109 |
9 |
| Alfa Laval Corporate AB | 1265 |
7 |
| Ecolab USA Inc. | 5190 |
7 |
| Halliburton Energy Services, Inc. | 20165 |
6 |
| Chevron U.S.A. Inc. | 3774 |
6 |
| Clean TeQ Pty Ltd | 23 |
6 |
| D.C. Water & Sewer Authority | 28 |
6 |
| Saudi Arabian Oil Company | 11322 |
6 |
| Veolia Water Technologies, Inc. | 80 |
6 |
| Sudhin Biopharma | 13 |
6 |
| New Vision Children's Foundation, Inc. | 12 |
6 |
| Doosan Heavy Industries & Construction Co., Ltd. | 604 |
5 |
| GM Innovations Limited | 16 |
5 |
| Kemira Oyj | 1167 |
5 |
| M-I L.L.C. | 893 |
5 |
| Other owners | 584 |