- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
Patent holdings for IPC class C22B 3/22
Total number of patents in this class: 1151
10-year publication summary
|
55
|
32
|
33
|
62
|
49
|
67
|
118
|
179
|
237
|
125
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Korea Zinc Co., Ltd. | 171 |
25 |
| POSCO Holdings Inc. | 678 |
21 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1226 |
20 |
| Freeport Minerals Corporation | 135 |
19 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1265 |
19 |
| Sumitomo Metal Mining Co., Ltd. | 1974 |
19 |
| Mitsubishi Materials Corporation | 2472 |
17 |
| Metso Finland Oy | 688 |
17 |
| Schlumberger Technology Corporation | 11818 |
13 |
| Toray Industries, Inc. | 7113 |
11 |
| Dowa ECO-SYSTEM Co., Ltd. | 58 |
11 |
| Kemco | 54 |
11 |
| JFE Steel Corporation | 7527 |
10 |
| Icsip Pty Ltd | 21 |
10 |
| BASF SE | 21303 |
9 |
| Asaka Riken Co., Ltd. | 54 |
8 |
| Gem Co., Ltd. | 356 |
8 |
| Hunan Brunp EV Recycling Co., Ltd. | 378 |
8 |
| Schlumberger Canada Limited | 7606 |
7 |
| LG Energy Solution, Ltd. | 18906 |
7 |
| Other owners | 881 |