- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
Patent holdings for IPC class C22B 3/12
Total number of patents in this class: 312
10-year publication summary
|
20
|
18
|
13
|
18
|
13
|
19
|
21
|
26
|
17
|
38
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Barrick Gold Corporation | 53 |
15 |
| Metso Finland Oy | 460 |
9 |
| BASF SE | 20961 |
8 |
| Mitsubishi Materials Corporation | 2453 |
7 |
| POSCO Holdings Inc. | 330 |
7 |
| Glencore Technology Pty Ltd | 51 |
6 |
| Stillwater Mining Company | 8 |
6 |
| Korea Institute of Geoscience and Mineral Resources | 239 |
5 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 133 |
5 |
| Avanti Materials Ltd | 10 |
5 |
| Zeotech Limited | 13 |
5 |
| Sumitomo Electric Industries, Ltd. | 15576 |
4 |
| Aqua Metals, Inc. | 40 |
4 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1244 |
4 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1213 |
4 |
| Northeastern University | 542 |
4 |
| Orway Mineral Consultants (WA) Pty Ltd. | 5 |
4 |
| Kinotech Corporation | 8 |
4 |
| National Institute of Advanced Industrial Science and Technology | 3797 |
3 |
| Battelle Memorial Institute | 2494 |
3 |
| Other owners | 200 |