- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 3/08 - Sulfuric acid
Patent holdings for IPC class C22B 3/08
Total number of patents in this class: 903
10-year publication summary
|
70
|
55
|
45
|
46
|
65
|
48
|
61
|
114
|
102
|
96
|
| 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 |
77 |
| Korea Zinc Co., Ltd. | 89 |
27 |
| Jetti Resources, LLC | 37 |
25 |
| Umicore | 642 |
24 |
| BASF SE | 20933 |
18 |
| Kemco | 36 |
15 |
| Gem Co., Ltd. | 216 |
14 |
| JX Nippon Mining & Metals Corporation | 1489 |
14 |
| PT Qmb New Energy Materials | 146 |
13 |
| PT Gem Indonesia New Energy Materials | 144 |
13 |
| BHP Billiton SSM Development Pty Ltd. | 30 |
12 |
| Technological Resources Pty. Limited | 453 |
12 |
| Korea Institute of Geoscience and Mineral Resources | 240 |
10 |
| Ecopro Materials, Co., Ltd. | 26 |
10 |
| PT ESG New Energy Material | 51 |
10 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1243 |
9 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1212 |
9 |
| Mitsubishi Materials Corporation | 2443 |
9 |
| Nemaska Lithium Inc. | 73 |
9 |
| Sherritt International Corporation | 29 |
9 |
| Other owners | 564 |