- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment 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: 604
10-year publication summary
|
33
|
48
|
30
|
50
|
32
|
27
|
42
|
38
|
47
|
21
|
| 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 |
57 |
| JX Nippon Mining & Metals Corporation | 1576 |
29 |
| Kyushu University, National University Corporation | 1572 |
25 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
22 |
| Centre National de La Recherche Scientifique | 9632 |
15 |
| Freeport Minerals Corporation | 80 |
15 |
| Metso Outotec Finland Oy | 795 |
14 |
| Universite de Montpellier | 920 |
11 |
| Outotec (Finland) Oy | 491 |
10 |
| Tenova Advanced Technologies Ltd. | 16 |
9 |
| Asaka Riken Co., Ltd. | 35 |
7 |
| Ecole Nationale Superieure de Chimie de Montpellier | 167 |
7 |
| Outotec Oyj | 318 |
7 |
| Shin-Etsu Chemical Co., Ltd. | 5132 |
6 |
| Metso Minerals Oy | 152 |
6 |
| Excir Works Corp. | 28 |
6 |
| Ecopro Materials, Co., Ltd. | 17 |
6 |
| University of South Australia | 194 |
5 |
| UT-Battelle, LLC | 1333 |
5 |
| Orf Technologies Inc. | 9 |
5 |
| Other owners | 337 |