- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
Patent holdings for IPC class C22B 3/44
Total number of patents in this class: 1655
10-year publication summary
|
87
|
79
|
85
|
77
|
113
|
117
|
159
|
182
|
197
|
158
|
| 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. | 1978 |
161 |
| Mitsubishi Materials Corporation | 2475 |
30 |
| JX Metals Circular Solutions Co., Ltd. | 82 |
30 |
| JX Nippon Mining & Metals Corporation | 1461 |
27 |
| Freeport Minerals Corporation | 136 |
22 |
| JFE Steel Corporation | 7549 |
22 |
| Korea Zinc Co., Ltd. | 171 |
21 |
| BASF SE | 21308 |
20 |
| Asaka Riken Co., Ltd. | 54 |
19 |
| Gem Co., Ltd. | 356 |
17 |
| PT Qmb New Energy Materials | 253 |
17 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1267 |
16 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1226 |
16 |
| Umicore | 775 |
14 |
| Kemco | 54 |
14 |
| PT ESG New Energy Material | 153 |
12 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11124 |
10 |
| Barrick Gold Corporation | 27 |
10 |
| Dowa Metals & Mining Co., Ltd. | 40 |
10 |
| Johnson Matthey Public Limited Company | 1761 |
10 |
| Other owners | 1157 |