- 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: 961
10-year publication summary
|
35
|
42
|
23
|
29
|
46
|
38
|
49
|
89
|
152
|
194
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Korea Zinc Co., Ltd. | 99 |
22 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1215 |
19 |
| Sumitomo Metal Mining Co., Ltd. | 1796 |
19 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1246 |
18 |
| Mitsubishi Materials Corporation | 2472 |
17 |
| Freeport Minerals Corporation | 117 |
13 |
| Metso Finland Oy | 619 |
12 |
| POSCO Holdings Inc. | 337 |
11 |
| Schlumberger Technology Corporation | 11054 |
10 |
| Dowa ECO-SYSTEM Co., Ltd. | 56 |
10 |
| Ecopro Materials, Co., Ltd. | 24 |
10 |
| Toray Industries, Inc. | 7006 |
9 |
| Kemco | 42 |
9 |
| Asaka Riken Co., Ltd. | 51 |
8 |
| JFE Steel Corporation | 7054 |
8 |
| Icsip Pty Ltd | 14 |
8 |
| Schlumberger Canada Limited | 7432 |
7 |
| BASF SE | 21087 |
7 |
| Hunan Brunp EV Recycling Co., Ltd. | 375 |
7 |
| Barrick Gold Corporation | 51 |
6 |
| Other owners | 731 |