- 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: 453
10-year publication summary
|
29
|
27
|
26
|
25
|
21
|
27
|
56
|
36
|
76
|
29
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Metal Mining Co., Ltd. | 1670 |
25 |
| LiLAC Solutions, Inc. | 44 |
14 |
| Barrick Gold Corporation | 73 |
13 |
| Jetti Resources, LLC | 30 |
11 |
| Dow Global Technologies LLC | 10147 |
8 |
| II-VI Delaware, Inc. | 1720 |
6 |
| JX Nippon Mining & Metals Corporation | 1576 |
6 |
| Lanxess Deutschland GmbH | 1104 |
6 |
| OCP S.A. | 70 |
6 |
| Schlumberger Technology Corporation | 9690 |
5 |
| Metso Outotec Finland Oy | 795 |
5 |
| Centre National de La Recherche Scientifique | 9632 |
4 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
4 |
| Purdue Research Foundation | 3277 |
4 |
| Fortum Oyj | 103 |
4 |
| Glencore Technology Pty Ltd | 46 |
4 |
| K-technologies, Inc. | 12 |
4 |
| SMS Group GmbH | 1029 |
4 |
| Stillwater Mining Company | 6 |
4 |
| Rio Tinto Iron and Titanium Canada Inc. | 15 |
4 |
| Other owners | 312 |