- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
Patent holdings for IPC class C22B 3/42
Total number of patents in this class: 724
10-year publication summary
|
26
|
25
|
21
|
28
|
58
|
37
|
89
|
95
|
102
|
70
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Metal Mining Co., Ltd. | 1974 |
28 |
| LiLAC Solutions, Inc. | 68 |
28 |
| Jetti Resources, LLC | 39 |
14 |
| Schlumberger Technology Corporation | 11818 |
9 |
| Purdue Research Foundation | 3916 |
8 |
| Barrick Gold Corporation | 27 |
8 |
| Metso Finland Oy | 688 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1265 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1226 |
7 |
| Korea Zinc Co., Ltd. | 171 |
7 |
| Lanxess Deutschland GmbH | 1139 |
7 |
| OCP S.A. | 84 |
7 |
| POSCO Holdings Inc. | 678 |
7 |
| Dow Global Technologies LLC | 10944 |
6 |
| II-VI Delaware, Inc. | 1623 |
6 |
| Stillwater Mining Company | 8 |
6 |
| DDP Specialty Electronic Materials US, LLC | 851 |
6 |
| Shine Technologies, LLC | 165 |
6 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11123 |
5 |
| Commonwealth Scientific and Industrial Research Organisation | 1655 |
5 |
| Other owners | 539 |