- 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 5/56 - Manufacture of steel by other methods
Patent holdings for IPC class C21C 5/56
Total number of patents in this class: 163
10-year publication summary
|
10
|
8
|
5
|
4
|
8
|
9
|
11
|
12
|
17
|
18
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2663 |
28 |
| Danieli & C. Officine Meccaniche S.p.A. | 720 |
15 |
| Tata Steel Limited | 162 |
7 |
| Tata Steel Nederland Technology BV | 161 |
6 |
| SMS Siemag Aktiengesellschaft | 486 |
5 |
| Tata Steel Ijmuiden B.V. | 325 |
5 |
| Tenova S.p.A. | 158 |
5 |
| SMS CONCAST ITALIA S.p.A. | 9 |
4 |
| AMI International S.A.P.I. de C.V. | 46 |
4 |
| Danieli Automation SpA | 127 |
3 |
| POSCO Co., Ltd. | 2006 |
3 |
| Primetals Technologies Austria GmbH | 573 |
3 |
| Metix (Pty) Limited | 14 |
3 |
| Siemens AG | 24033 |
2 |
| Siemens VAI Metals Technologies GmbH | 204 |
2 |
| Cisdi Engineering Co., Ltd. | 107 |
2 |
| JFE Steel Corporation | 7508 |
2 |
| Newsouth Innovations Pty Limited | 620 |
2 |
| Outotec Oyj | 236 |
2 |
| Pyrotek, Inc. | 207 |
2 |
| Other owners | 58 |