- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 5/02 - Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
Patent holdings for IPC class C21B 5/02
Total number of patents in this class: 31
10-year publication summary
|
2
|
1
|
5
|
3
|
4
|
1
|
2
|
2
|
1
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2285 |
4 |
| Fiday Gestion | 7 |
3 |
| Subcoal International B.V. | 15 |
3 |
| Hyundai Steel Company | 427 |
2 |
| I.blu S.r.l. | 4 |
2 |
| Pipex Energy S.r.l. | 6 |
2 |
| Lockheed Martin Corporation | 3277 |
1 |
| Affival | 25 |
1 |
| Eco'ring | 15 |
1 |
| Harsco Technologies Corporation | 3 |
1 |
| JFE Steel Corporation | 6840 |
1 |
| Northeastern University | 539 |
1 |
| Nupro Corporation | 1 |
1 |
| Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | 71 |
1 |
| POSCO | 2186 |
1 |
| Rheinkalk GmbH | 27 |
1 |
| Sachtleben Chemie GmbH | 63 |
1 |
| ThyssenKrupp Industrial Solutions AG | 631 |
1 |
| ThyssenKrupp Steel Europe AG | 955 |
1 |
| Beijing Haixin Energy Technology Co., Ltd. | 26 |
1 |
| Other owners | 1 |