- 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: 1048
10-year publication summary
|
42
|
23
|
29
|
46
|
38
|
49
|
91
|
153
|
201
|
53
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Korea Zinc Co., Ltd. | 155 |
25 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1217 |
19 |
| Sumitomo Metal Mining Co., Ltd. | 1926 |
19 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1248 |
18 |
| Mitsubishi Materials Corporation | 2462 |
17 |
| Freeport Minerals Corporation | 128 |
16 |
| Metso Finland Oy | 672 |
15 |
| POSCO Holdings Inc. | 367 |
14 |
| Schlumberger Technology Corporation | 11449 |
12 |
| Dowa ECO-SYSTEM Co., Ltd. | 57 |
11 |
| Kemco | 48 |
11 |
| Toray Industries, Inc. | 7032 |
10 |
| Icsip Pty Ltd | 21 |
10 |
| JFE Steel Corporation | 7308 |
9 |
| BASF SE | 21127 |
8 |
| Asaka Riken Co., Ltd. | 51 |
8 |
| Schlumberger Canada Limited | 7544 |
7 |
| LG Energy Solution, Ltd. | 17308 |
7 |
| Hunan Brunp EV Recycling Co., Ltd. | 375 |
7 |
| Alliance Magnesium | 18 |
6 |
| Other owners | 799 |