- 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: 1031
10-year publication summary
|
36
|
34
|
38
|
38
|
30
|
45
|
68
|
76
|
106
|
19
|
| 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. | 1895 |
60 |
| JX Nippon Mining & Metals Corporation | 1471 |
47 |
| Freeport Minerals Corporation | 125 |
24 |
| FLSmidth A/S | 786 |
19 |
| Metso Finland Oy | 660 |
18 |
| Nemaska Lithium Inc. | 75 |
15 |
| Technological Resources Pty. Limited | 449 |
14 |
| Outotec (Finland) Oy | 459 |
13 |
| Hatch Ltd. | 217 |
11 |
| Anglo American Technical & Sustainability Services Ltd | 68 |
11 |
| CPS Technology Holdings LLC | 757 |
10 |
| Differential Engineering Inc. | 13 |
8 |
| Korea Zinc Co., Ltd. | 107 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1248 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1217 |
7 |
| JX Metals Circular Solutions Co., Ltd. | 72 |
7 |
| Commonwealth Scientific and Industrial Research Organisation | 1661 |
6 |
| Dowa ECO-SYSTEM Co., Ltd. | 57 |
6 |
| Sherritt International Corporation | 27 |
6 |
| Anglo Corporate Services South Africa (Proprietary) Limited | 21 |
6 |
| Other owners | 728 |