- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 11/00 - Making pig-iron other than in blast furnaces
Patent holdings for IPC class C21B 11/00
Total number of patents in this class: 102
10-year publication summary
|
7
|
5
|
0
|
1
|
4
|
8
|
5
|
6
|
6
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO | 2155 |
15 |
| Tecnored Desenvolvimento Tecnologico S.A. | 39 |
8 |
| JFE Steel Corporation | 7259 |
6 |
| Technological Resources Pty. Limited | 445 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2842 |
4 |
| Northeastern University | 561 |
4 |
| Newsouth Innovations Pty Limited | 613 |
3 |
| Metso Metals Oy | 217 |
3 |
| Hoffman & Sons Technologies, LLC | 3 |
2 |
| Luossavaara-Kiirunavaara AB | 126 |
2 |
| Nippon Steel Corporation | 6673 |
2 |
| Nu-Iron Technology, LLC | 30 |
2 |
| Primetals Technologies Austria GmbH | 563 |
2 |
| China ENFI Engineering Corp. | 106 |
2 |
| Shandong Molong Petroleum Machinery Co., Ltd. | 19 |
2 |
| Nsgi Steel Inc. | 5 |
2 |
| Electrasteel, Inc. | 44 |
2 |
| Tata Steel Limited | 17 |
2 |
| Toyota Motor Corporation | 34274 |
1 |
| Hitachi, Ltd. | 15869 |
1 |
| Other owners | 31 |