- 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: 489
10-year publication summary
|
32
|
32
|
36
|
24
|
32
|
35
|
20
|
37
|
53
|
40
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Outotec (Finland) Oy | 480 |
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. | 1782 |
10 |
| BASF SE | 20915 |
8 |
| Freeport Minerals Corporation | 108 |
6 |
| West Virginia University | 181 |
6 |
| Battelle Memorial Institute | 2491 |
5 |
| Purdue Research Foundation | 3619 |
5 |
| Ecolab USA Inc. | 5499 |
5 |
| Metso Finland Oy | 463 |
5 |
| Cidra Corporate Services, LLC | 94 |
4 |
| Korea Institute of Geoscience and Mineral Resources | 240 |
4 |
| Kyushu University, National University Corporation | 1657 |
4 |
| Outotec Oyj | 278 |
4 |
| Virginia Tech Intellectual Properties, Inc. | 869 |
4 |
| Enviroleach Technologies Inc. | 10 |
4 |
| Other owners | 339 |