- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
Patent holdings for IPC class C22B 3/06
Total number of patents in this class: 937
10-year publication summary
|
34
|
28
|
28
|
41
|
33
|
53
|
68
|
84
|
106
|
114
|
| 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. | 1796 |
43 |
| Freeport Minerals Corporation | 117 |
27 |
| JX Nippon Mining & Metals Corporation | 1479 |
22 |
| JX Metals Circular Solutions Co., Ltd. | 67 |
15 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1246 |
13 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1215 |
13 |
| Korea Zinc Co., Ltd. | 99 |
13 |
| Electrasteel, Inc. | 44 |
13 |
| JFE Steel Corporation | 7054 |
12 |
| Asaka Riken Co., Ltd. | 51 |
11 |
| Technological Resources Pty. Limited | 451 |
11 |
| LiLAC Solutions, Inc. | 59 |
11 |
| Mitsubishi Materials Corporation | 2472 |
10 |
| Kemco | 42 |
9 |
| Purdue Research Foundation | 3726 |
7 |
| Gem Co., Ltd. | 223 |
7 |
| Rio Tinto Technological Resources Inc. | 16 |
7 |
| PT Qmb New Energy Materials | 144 |
7 |
| Metso Finland Oy | 619 |
7 |
| PT Gem Indonesia New Energy Materials | 144 |
7 |
| Other owners | 672 |