- All sections
- C - Chemistrymetallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 1/22 - Treatment of water, waste water, or sewage by freezing
Patent holdings for IPC class C02F 1/22
Total number of patents in this class: 170
10-year publication summary
|
8
|
18
|
20
|
14
|
15
|
16
|
19
|
12
|
21
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| University College Dublin, National University of Ireland, Dublin | 360 |
8 |
| Sanuwave, Inc. | 91 |
6 |
| Sulzer Management AG | 662 |
5 |
| Bion Environmental Technologies, Inc. | 8 |
4 |
| Korea Institute of Industrial Technology | 1010 |
4 |
| The Board of Regents of the University of Oklahoma | 613 |
3 |
| China Petroleum & Chemical Corporation | 1908 |
3 |
| Technische Universiteit Delft | 724 |
3 |
| Qatar Foundation for Education, Science and Community Development | 38 |
3 |
| Cool Separations B.V. | 8 |
3 |
| Oy Infraconsulting AB Ltd | 3 |
3 |
| Siemens AG | 24477 |
2 |
| The Regents of the University of California | 19929 |
2 |
| The Regents of the University of Michigan | 4697 |
2 |
| Battelle Memorial Institute | 2485 |
2 |
| Adionics | 22 |
2 |
| BKT Co., Ltd. | 67 |
2 |
| EFC Solutions Inc. | 2 |
2 |
| The Governing Council of The University of Toronto, | 1477 |
2 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1243 |
2 |
| Other owners | 107 |