- 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: 1113
10-year publication summary
|
43
|
50
|
48
|
48
|
42
|
71
|
88
|
88
|
125
|
84
|
| 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 |
61 |
| JX Nippon Mining & Metals Corporation | 1458 |
47 |
| Freeport Minerals Corporation | 139 |
27 |
| Metso Finland Oy | 692 |
24 |
| FLSmidth A/S | 788 |
19 |
| Nemaska Lithium Inc. | 79 |
15 |
| Technological Resources Pty. Limited | 442 |
15 |
| Outotec (Finland) Oy | 455 |
13 |
| Anglo American Technical & Sustainability Services Ltd | 72 |
13 |
| Hatch Ltd. | 221 |
11 |
| Korea Zinc Co., Ltd. | 173 |
10 |
| CPS Technology Holdings LLC | 759 |
10 |
| Differential Engineering Inc. | 13 |
8 |
| Gem Co., Ltd. | 361 |
8 |
| PT Qmb New Energy Materials | 257 |
8 |
| PT ESG New Energy Material | 158 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1269 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1226 |
7 |
| Research Institute of Industrial Science & Technology | 569 |
7 |
| Kemco | 54 |
7 |
| Other owners | 788 |