- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment of raw materials
- C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
Patent holdings for IPC class C22B 3/20
Total number of patents in this class: 389
10-year publication summary
|
30
|
33
|
32
|
36
|
24
|
32
|
34
|
20
|
32
|
13
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Outotec (Finland) Oy | 491 |
18 |
| Jetti Resources, LLC | 30 |
16 |
| Nemaska Lithium Inc. | 69 |
12 |
| Sumitomo Metal Mining Co., Ltd. | 1670 |
8 |
| Freeport Minerals Corporation | 80 |
6 |
| Outotec Oyj | 318 |
6 |
| Metso Outotec Finland Oy | 795 |
6 |
| BASF SE | 19740 |
5 |
| Purdue Research Foundation | 3277 |
5 |
| Ecolab USA Inc. | 5190 |
5 |
| West Virginia University | 178 |
5 |
| Battelle Memorial Institute | 2356 |
4 |
| Asaka Riken Co., Ltd. | 35 |
4 |
| Virginia Tech Intellectual Properties, Inc. | 772 |
4 |
| Enviroleach Technologies Inc. | 10 |
4 |
| Indorama Ventures Oxides Australia Pty Limited | 19 |
4 |
| Schlumberger Canada Limited | 6913 |
3 |
| Australian Nuclear Science and Technology Organisation | 71 |
3 |
| BHP Billiton SSM Development Pty Ltd. | 30 |
3 |
| Commonwealth Scientific and Industrial Research Organisation | 1652 |
3 |
| Other owners | 265 |