- 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 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
Patent holdings for IPC class C21C 7/00
Total number of patents in this class: 652
10-year publication summary
|
38
|
29
|
41
|
35
|
26
|
36
|
60
|
52
|
75
|
58
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6806 |
70 |
| Nippon Steel Corporation | 6195 |
41 |
| ArcelorMittal | 2254 |
34 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
18 |
| Nanjing Iron&Steel Co.,Ltd. | 163 |
17 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
16 |
| Nippon Yakin Kogyo Co., Ltd. | 62 |
12 |
| POSCO | 2188 |
12 |
| Affival | 25 |
11 |
| Shandong Iron and Steel Company Ltd | 33 |
10 |
| Baoshan Iron & Steel Co., Ltd. | 960 |
8 |
| Foseco International Limited | 212 |
8 |
| University of Science and Technology Beijing | 278 |
8 |
| Jiangsu Shagang Group Co., Ltd. | 89 |
8 |
| Laiwu Steel Yinshan Section Co., Ltd. | 21 |
8 |
| Hitachi Metals, Ltd. | 1988 |
7 |
| Institute of Metal Research Chinese Academy of Sciences | 118 |
7 |
| NIPPON STEEL Stainless Steel Corporation | 287 |
7 |
| Danieli & C. Officine Meccaniche S.p.A. | 713 |
6 |
| POSCO Co., Ltd. | 1558 |
6 |
| Other owners | 338 |