- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
Patent holdings for IPC class C22B 3/42
Total number of patents in this class: 635
10-year publication summary
|
21
|
22
|
20
|
21
|
25
|
42
|
29
|
73
|
82
|
84
|
| 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 |
27 |
| LiLAC Solutions, Inc. | 59 |
24 |
| Jetti Resources, LLC | 38 |
14 |
| Barrick Gold Corporation | 51 |
13 |
| Lanxess Deutschland GmbH | 1113 |
8 |
| Metso Finland Oy | 635 |
8 |
| Schlumberger Technology Corporation | 11089 |
7 |
| Purdue Research Foundation | 3739 |
7 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1246 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1215 |
7 |
| OCP S.A. | 83 |
7 |
| Dow Global Technologies LLC | 10582 |
6 |
| Fortum Oyj | 95 |
6 |
| II-VI Delaware, Inc. | 1649 |
6 |
| Stillwater Mining Company | 8 |
6 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10954 |
5 |
| JX Nippon Mining & Metals Corporation | 1479 |
5 |
| K-technologies, Inc. | 13 |
5 |
| Korea Zinc Co., Ltd. | 104 |
5 |
| Avanti Materials Ltd | 10 |
5 |
| Other owners | 457 |