- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
Patent holdings for IPC class C22B 3/20
Total number of patents in this class: 497
10-year publication summary
|
23
|
27
|
26
|
22
|
28
|
24
|
14
|
29
|
49
|
44
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Outotec (Finland) Oy | 477 |
17 |
| Jetti Resources, LLC | 37 |
17 |
| Nemaska Lithium Inc. | 73 |
12 |
| Asaka Riken Co., Ltd. | 49 |
10 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1244 |
10 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1213 |
10 |
| Sumitomo Metal Mining Co., Ltd. | 1794 |
10 |
| BASF SE | 21036 |
8 |
| Freeport Minerals Corporation | 116 |
6 |
| West Virginia University | 181 |
6 |
| Battelle Memorial Institute | 2485 |
5 |
| Purdue Research Foundation | 3687 |
5 |
| Ecolab USA Inc. | 5544 |
5 |
| Shine Technologies, LLC | 143 |
5 |
| Metso Finland Oy | 466 |
5 |
| Cidra Corporate Services, LLC | 95 |
4 |
| Korea Institute of Geoscience and Mineral Resources | 241 |
4 |
| Kyushu University, National University Corporation | 1661 |
4 |
| Outotec Oyj | 274 |
4 |
| Virginia Tech Intellectual Properties, Inc. | 895 |
4 |
| Other owners | 346 |