- 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: 1435
10-year publication summary
|
64
|
71
|
63
|
70
|
62
|
83
|
78
|
111
|
147
|
144
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Metal Mining Co., Ltd. | 1795 |
157 |
| JX Nippon Mining & Metals Corporation | 1481 |
27 |
| Mitsubishi Materials Corporation | 2474 |
27 |
| JX Metals Circular Solutions Co., Ltd. | 67 |
24 |
| Freeport Minerals Corporation | 117 |
18 |
| Asaka Riken Co., Ltd. | 50 |
16 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1244 |
16 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1213 |
16 |
| Korea Zinc Co., Ltd. | 93 |
16 |
| BASF SE | 21071 |
14 |
| JFE Steel Corporation | 7011 |
14 |
| Barrick Gold Corporation | 52 |
13 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10961 |
11 |
| Dowa Metals & Mining Co., Ltd. | 42 |
11 |
| Umicore | 671 |
10 |
| Gem Co., Ltd. | 216 |
9 |
| Yara International ASA | 860 |
9 |
| Excir Works Corp. | 31 |
9 |
| Kemco | 38 |
9 |
| Primobius GmbH | 15 |
8 |
| Other owners | 1001 |