- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 19/20 - Obtaining zinc otherwise than by distilling
Patent holdings for IPC class C22B 19/20
Total number of patents in this class: 123
10-year publication summary
|
11
|
6
|
4
|
3
|
11
|
15
|
5
|
7
|
14
|
6
|
| 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. | 1779 |
7 |
| Outotec Oyj | 278 |
6 |
| Kinotech Corporation | 8 |
5 |
| Metaleach Limited | 16 |
4 |
| Kinaltek Pty. Ltd. | 7 |
4 |
| Korea Mine Rehabilitation and Mineral Resources Corporation | 12 |
4 |
| BASF SE | 20915 |
3 |
| JFE Steel Corporation | 6852 |
3 |
| Korea Zinc Co., Ltd. | 89 |
3 |
| Chongqing Dongqun Technology Co., Ltd. | 5 |
3 |
| Helios Project Ltd. | 19 |
3 |
| Anglo Operations Limited | 9 |
2 |
| Beijing University of Technology | 492 |
2 |
| Canadus Chemical, LLC | 3 |
2 |
| JNC Corporation | 1561 |
2 |
| Metals Technology Development Company LLC | 8 |
2 |
| Servicios Condumex, S.A. de C.V. | 44 |
2 |
| TAM 5, S.L. | 2 |
2 |
| The University of Tokyo | 4179 |
2 |
| Yava Technologies Inc. | 9 |
2 |
| Other owners | 60 |