- 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: 529
10-year publication summary
|
34
|
23
|
18
|
22
|
25
|
32
|
43
|
47
|
87
|
41
|
| 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 |
40 |
| JX Nippon Mining & Metals Corporation | 1576 |
28 |
| Guangdong Brunp Recycling Technology Co., Ltd | 674 |
21 |
| Hunan Brunp Recycling Technology Co., Ltd. | 622 |
21 |
| Nemaska Lithium Inc. | 69 |
12 |
| Hunan Brunp EV Recycling Co., Ltd. | 327 |
10 |
| Hitachi Metals, Ltd. | 2175 |
9 |
| Hunan Brunp Vehicles Recycling Co., Ltd. | 73 |
8 |
| JFE Steel Corporation | 6067 |
7 |
| Northeastern University | 493 |
6 |
| University of Leeds | 279 |
6 |
| The Boeing Company | 19843 |
5 |
| Asaka Riken Co., Ltd. | 35 |
5 |
| Dowa ECO-SYSTEM Co., Ltd. | 51 |
5 |
| Mitsubishi Materials Corporation | 2378 |
5 |
| Peloton Resources Pty Ltd | 10 |
5 |
| Newcrest Mining Limited | 38 |
5 |
| BASF SE | 19740 |
4 |
| Ecotec Gestione Impianti S.r.l. | 9 |
4 |
| Grirem Advanced Materials Co., Ltd. | 114 |
4 |
| Other owners | 319 |