- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
Patent holdings for IPC class C22B 3/26
Total number of patents in this class: 797
10-year publication summary
|
30
|
50
|
32
|
29
|
42
|
38
|
58
|
56
|
62
|
59
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Metal Mining Co., Ltd. | 1985 |
57 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11127 |
29 |
| Kyushu University, National University Corporation | 1729 |
25 |
| JX Nippon Mining & Metals Corporation | 1458 |
21 |
| Centre National de La Recherche Scientifique | 11059 |
20 |
| JX Metals Circular Solutions Co., Ltd. | 82 |
17 |
| Asaka Riken Co., Ltd. | 54 |
16 |
| Universite de Montpellier | 1042 |
16 |
| Freeport Minerals Corporation | 139 |
15 |
| Metso Finland Oy | 692 |
13 |
| Ecole Nationale Superieure de Chimie de Montpellier | 236 |
11 |
| Outotec (Finland) Oy | 455 |
10 |
| BASF SE | 21306 |
8 |
| Korea Zinc Co., Ltd. | 173 |
8 |
| Tenova Advanced Technologies Ltd. | 17 |
8 |
| Outotec Oyj | 234 |
7 |
| Kemco | 54 |
7 |
| Shin-Etsu Chemical Co., Ltd. | 6120 |
6 |
| Gem Co., Ltd. | 361 |
6 |
| Energy Exploration Technologies, Inc. | 61 |
6 |
| Other owners | 491 |