- 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: 738
10-year publication summary
|
29
|
41
|
35
|
26
|
36
|
60
|
52
|
76
|
90
|
66
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7632 |
83 |
| Nippon Steel Corporation | 6982 |
49 |
| ArcelorMittal | 2736 |
47 |
| Nanjing Iron&Steel Co.,Ltd. | 188 |
20 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
18 |
| SunCoke Technology and Development LLC | 227 |
14 |
| Nippon Yakin Kogyo Co., Ltd. | 74 |
13 |
| Affival | 26 |
12 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2841 |
12 |
| Jiangsu Shagang Group Co., Ltd. | 117 |
12 |
| POSCO | 2143 |
11 |
| Shandong Iron and Steel Company Ltd | 38 |
11 |
| University of Science and Technology Beijing | 316 |
9 |
| Laiwu Steel Yinshan Section Co., Ltd. | 25 |
9 |
| Foseco International Limited | 216 |
8 |
| POSCO Co., Ltd. | 2029 |
8 |
| Bengang Steel Plates Co., Ltd. | 42 |
8 |
| Hitachi Metals, Ltd. | 1822 |
7 |
| Baoshan Iron & Steel Co., Ltd. | 1128 |
7 |
| Danieli & C. Officine Meccaniche S.p.A. | 721 |
7 |
| Other owners | 373 |