- 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: 554
10-year publication summary
|
32
|
36
|
24
|
32
|
35
|
20
|
39
|
62
|
59
|
48
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Jetti Resources, LLC | 39 |
17 |
| Outotec (Finland) Oy | 455 |
16 |
| Asaka Riken Co., Ltd. | 54 |
12 |
| Nemaska Lithium Inc. | 77 |
12 |
| Sumitomo Metal Mining Co., Ltd. | 1971 |
11 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1265 |
10 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1226 |
10 |
| BASF SE | 21303 |
8 |
| Freeport Minerals Corporation | 135 |
7 |
| Battelle Memorial Institute | 2603 |
6 |
| Ecolab USA Inc. | 5792 |
6 |
| West Virginia University | 181 |
6 |
| Metso Finland Oy | 688 |
6 |
| Purdue Research Foundation | 3913 |
5 |
| Korea Institute of Geoscience and Mineral Resources | 254 |
5 |
| Research Institute of Industrial Science & Technology | 567 |
5 |
| Shine Technologies, LLC | 165 |
5 |
| POSCO Holdings Inc. | 677 |
5 |
| Schlumberger Technology Corporation | 11798 |
4 |
| Schlumberger Canada Limited | 7606 |
4 |
| Other owners | 394 |