- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment 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: 837
10-year publication summary
|
77
|
59
|
43
|
50
|
48
|
48
|
41
|
68
|
79
|
33
|
| 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 |
59 |
| JX Nippon Mining & Metals Corporation | 1576 |
50 |
| FLSmidth A/S | 923 |
19 |
| Freeport Minerals Corporation | 80 |
15 |
| Nemaska Lithium Inc. | 69 |
15 |
| Metso Outotec Finland Oy | 795 |
14 |
| Outotec (Finland) Oy | 491 |
13 |
| Barrick Gold Corporation | 73 |
12 |
| Technological Resources Pty. Limited | 444 |
12 |
| Hatch Ltd. | 219 |
9 |
| CPS Technology Holdings LLC | 652 |
8 |
| Commonwealth Scientific and Industrial Research Organisation | 1652 |
6 |
| Differential Engineering Inc. | 10 |
6 |
| Sherritt International Corporation | 30 |
6 |
| 3r-cycle Oy | 9 |
6 |
| Anglo American Technical & Sustainability Services Ltd | 52 |
6 |
| Hitachi, Ltd. | 16452 |
5 |
| Chevron U.S.A. Inc. | 3774 |
5 |
| Battelle Energy Alliance, LLC | 569 |
5 |
| Ecolab USA Inc. | 5190 |
5 |
| Other owners | 561 |