- 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: 30
10-year publication summary
|
1
|
5
|
3
|
4
|
1
|
2
|
2
|
1
|
3
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2672 |
5 |
| Subcoal International B.V. | 16 |
3 |
| Fiday Gestion | 6 |
2 |
| Hyundai Steel Company | 531 |
2 |
| I.blu S.r.l. | 4 |
2 |
| Lockheed Martin Corporation | 3255 |
1 |
| Affival | 26 |
1 |
| Eco'ring | 15 |
1 |
| Ecolab USA Inc. | 5796 |
1 |
| JFE Steel Corporation | 7527 |
1 |
| Northeastern University | 573 |
1 |
| Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | 84 |
1 |
| POSCO | 2143 |
1 |
| Rheinkalk GmbH | 28 |
1 |
| Sachtleben Chemie GmbH | 45 |
1 |
| ThyssenKrupp Industrial Solutions AG | 630 |
1 |
| ThyssenKrupp Steel Europe AG | 990 |
1 |
| Beijing Haixin Energy Technology Co., Ltd. | 26 |
1 |
| Pipex Energy S.r.l. | 2 |
1 |
| Qcd Innovations, LLC | 2 |
1 |
| Other owners | 1 |