- All sections
- C - Chemistrymetallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steeltreatment in molten state of ferrous alloys
- C21C 7/10 - Handling in vacuum
Patent holdings for IPC class C21C 7/10
Total number of patents in this class: 333
10-year publication summary
|
7
|
12
|
13
|
17
|
19
|
19
|
30
|
32
|
33
|
32
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6874 |
52 |
| Nanjing Iron&Steel Co.,Ltd. | 165 |
23 |
| Nippon Steel Corporation | 6296 |
19 |
| Baoshan Iron & Steel Co., Ltd. | 965 |
13 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
10 |
| ArcelorMittal | 2315 |
9 |
| Jiangsu Shagang Group Co., Ltd. | 92 |
9 |
| Shandong Iron and Steel Company Ltd | 34 |
7 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 66 |
7 |
| Laiwu Steel Yinshan Section Co., Ltd. | 21 |
7 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 61 |
6 |
| Nippon Yakin Kogyo Co., Ltd. | 67 |
6 |
| Danieli & C. Officine Meccaniche S.p.A. | 718 |
5 |
| Institute of Metal Research Chinese Academy of Sciences | 118 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2875 |
5 |
| Nucor Corporation | 416 |
5 |
| SMS Group GmbH | 1127 |
5 |
| SMS Mevac GmbH | 15 |
5 |
| Maanshan Iron & Steel Co. Ltd. | 30 |
4 |
| Sumitomo Metal Industries, Ltd. | 371 |
4 |
| Other owners | 127 |