- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment of raw materials
- C22B 1/02 - Roasting processes
Patent holdings for IPC class C22B 1/02
Total number of patents in this class: 636
10-year publication summary
|
23
|
18
|
22
|
25
|
32
|
44
|
47
|
89
|
116
|
12
|
| 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. | 1730 |
45 |
| Guangdong Brunp Recycling Technology Co., Ltd | 981 |
34 |
| Hunan Brunp Recycling Technology Co., Ltd. | 945 |
34 |
| JX Nippon Mining & Metals Corporation | 1524 |
24 |
| Nemaska Lithium Inc. | 71 |
12 |
| Hunan Brunp EV Recycling Co., Ltd. | 363 |
10 |
| Korea Zinc Co., Ltd. | 63 |
8 |
| Hunan Brunp Vehicles Recycling Co., Ltd. | 75 |
8 |
| BASF SE | 20432 |
7 |
| Dowa ECO-SYSTEM Co., Ltd. | 54 |
7 |
| JFE Steel Corporation | 6557 |
7 |
| Mitsubishi Materials Corporation | 2406 |
7 |
| Northeastern University | 522 |
7 |
| The Boeing Company | 19911 |
6 |
| Hitachi Metals, Ltd. | 2021 |
6 |
| University of Leeds | 286 |
6 |
| JX Metals Circular Solutions Co., Ltd. | 27 |
6 |
| Hitachi, Ltd. | 15226 |
5 |
| Asaka Riken Co., Ltd. | 40 |
5 |
| Central South University | 404 |
5 |
| Other owners | 387 |