- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment 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: 523
10-year publication summary
|
27
|
26
|
25
|
21
|
27
|
57
|
36
|
78
|
82
|
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. | 1726 |
25 |
| LiLAC Solutions, Inc. | 49 |
19 |
| Jetti Resources, LLC | 37 |
14 |
| Barrick Gold Corporation | 73 |
13 |
| Dow Global Technologies LLC | 10143 |
7 |
| II-VI Delaware, Inc. | 1715 |
6 |
| JX Nippon Mining & Metals Corporation | 1526 |
6 |
| Lanxess Deutschland GmbH | 1119 |
6 |
| OCP S.A. | 73 |
6 |
| Schlumberger Technology Corporation | 10228 |
5 |
| Purdue Research Foundation | 3471 |
5 |
| Guangdong Brunp Recycling Technology Co., Ltd | 971 |
5 |
| Hunan Brunp Recycling Technology Co., Ltd. | 928 |
5 |
| K-technologies, Inc. | 13 |
5 |
| Stillwater Mining Company | 7 |
5 |
| Avanti Materials Ltd | 10 |
5 |
| Metso Outotec Finland Oy | 797 |
5 |
| Centre National de La Recherche Scientifique | 10068 |
4 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10682 |
4 |
| Fortum Oyj | 97 |
4 |
| Other owners | 369 |