- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
Patent holdings for IPC class C22B 3/04
Total number of patents in this class: 966
10-year publication summary
|
59
|
43
|
50
|
48
|
48
|
42
|
70
|
88
|
81
|
69
|
| 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. | 1779 |
61 |
| JX Nippon Mining & Metals Corporation | 1489 |
47 |
| Freeport Minerals Corporation | 107 |
20 |
| FLSmidth A/S | 772 |
19 |
| Nemaska Lithium Inc. | 73 |
15 |
| Metso Finland Oy | 452 |
14 |
| Outotec (Finland) Oy | 480 |
13 |
| Technological Resources Pty. Limited | 453 |
13 |
| Barrick Gold Corporation | 52 |
12 |
| Hatch Ltd. | 214 |
10 |
| CPS Technology Holdings LLC | 725 |
10 |
| Anglo American Technical & Sustainability Services Ltd | 60 |
9 |
| Differential Engineering Inc. | 13 |
8 |
| Korea Zinc Co., Ltd. | 89 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1243 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1212 |
7 |
| Commonwealth Scientific and Industrial Research Organisation | 1651 |
6 |
| 3r-cycle Oy | 8 |
6 |
| Metso Outotec Finland Oy | 361 |
6 |
| BASF SE | 20933 |
5 |
| Other owners | 670 |