- 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 5/48 - Bottoms or tuyères of converters
Patent holdings for IPC class C21C 5/48
Total number of patents in this class: 69
10-year publication summary
|
5
|
2
|
3
|
3
|
2
|
4
|
3
|
7
|
2
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Refractory Intellectual Property GmbH & Co. KG | 567 |
17 |
| JFE Steel Corporation | 7527 |
7 |
| Shinagawa Refractories Co., Ltd. | 50 |
4 |
| TDK Corporation | 6858 |
2 |
| Air Products and Chemicals, Inc. | 1471 |
2 |
| ATI Properties LLC | 200 |
2 |
| Hatch Ltd. | 221 |
2 |
| Krosakiharima Corporation | 296 |
2 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
2 |
| Nucor Corporation | 418 |
2 |
| Techcom GmbH | 8 |
2 |
| Vesuvius Crucible Company | 30 |
2 |
| Siemens AG | 24029 |
1 |
| Siemens VAI Metals Technologies GmbH | 204 |
1 |
| Baoshan Iron & Steel Co., Ltd. | 1102 |
1 |
| Central Iron & Steel Research Institute | 15 |
1 |
| Korea Institute of Geoscience and Mineral Resources | 254 |
1 |
| Paul Wurth S.A. | 432 |
1 |
| POSCO Co., Ltd. | 2012 |
1 |
| Primetals Technologies Austria GmbH | 573 |
1 |
| Other owners | 15 |