- 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: 68
10-year publication summary
|
5
|
2
|
2
|
3
|
2
|
4
|
2
|
4
|
2
|
0
|
| 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 | 558 |
16 |
| JFE Steel Corporation | 7339 |
7 |
| Shinagawa Refractories Co., Ltd. | 52 |
4 |
| TDK Corporation | 6803 |
2 |
| Air Products and Chemicals, Inc. | 1462 |
2 |
| ATI Properties LLC | 201 |
2 |
| Hatch Ltd. | 220 |
2 |
| Krosakiharima Corporation | 293 |
2 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
2 |
| Nucor Corporation | 411 |
2 |
| Techcom GmbH | 9 |
2 |
| Vesuvius Crucible Company | 34 |
2 |
| Siemens AG | 24236 |
1 |
| Siemens VAI Metals Technologies GmbH | 208 |
1 |
| Air Liquide Advanced Technologies U.S. LLC | 88 |
1 |
| Baoshan Iron & Steel Co., Ltd. | 1072 |
1 |
| Central Iron & Steel Research Institute | 15 |
1 |
| Korea Institute of Geoscience and Mineral Resources | 242 |
1 |
| Paul Wurth S.A. | 430 |
1 |
| POSCO Co., Ltd. | 1656 |
1 |
| Other owners | 15 |