- 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 7/072 - Treatment with gases
Patent holdings for IPC class C21C 7/072
Total number of patents in this class: 181
10-year publication summary
|
4
|
13
|
8
|
5
|
10
|
13
|
24
|
8
|
22
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7012 |
25 |
| ArcelorMittal | 2369 |
10 |
| Refractory Intellectual Property GmbH & Co. KG | 545 |
8 |
| Laiwu Steel Yinshan Section Co., Ltd. | 21 |
6 |
| Foseco International Limited | 213 |
5 |
| TDK Corporation | 6877 |
4 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
4 |
| Nippon Yakin Kogyo Co., Ltd. | 68 |
4 |
| SMS Group GmbH | 1136 |
4 |
| Southwire Company, LLC | 791 |
4 |
| Jiangsu Shagang Group Co., Ltd. | 97 |
4 |
| Krosakiharima Corporation | 290 |
3 |
| Nippon Steel Corporation | 6465 |
3 |
| POSCO | 2176 |
3 |
| Soochow University | 1748 |
3 |
| Sumitomo Metal Industries, Ltd. | 363 |
3 |
| University of Science and Technology Beijing | 292 |
3 |
| A. Finkl & Sons Co. | 82 |
2 |
| Danieli & C. Officine Meccaniche S.p.A. | 713 |
2 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 63 |
2 |
| Other owners | 79 |