- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 7/16 - Tuyères
Patent holdings for IPC class C21B 7/16
Total number of patents in this class: 190
10-year publication summary
|
14
|
3
|
10
|
8
|
7
|
6
|
19
|
12
|
12
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Paul Wurth S.A. | 419 |
34 |
| JFE Steel Corporation | 6827 |
16 |
| ArcelorMittal | 2275 |
12 |
| POSCO | 2187 |
7 |
| Nippon Steel Corporation | 6220 |
6 |
| Danieli Corus BV | 26 |
4 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3974 |
4 |
| Seoul Engineering Co., Ltd. | 10 |
4 |
| Changli Xingguo Precision Parts Co., Ltd | 5 |
4 |
| Siemens VAI Metals Technologies GmbH | 222 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2873 |
3 |
| Nippon Steel Engineering Co., Ltd. | 205 |
3 |
| Tata Steel Limited | 175 |
3 |
| Subcoal International B.V. | 15 |
3 |
| Shanghai University | 72 |
3 |
| Xinjiang Bayi Iron & Steel Co., Ltd. | 6 |
3 |
| Somerset Ipco, LLC. | 4 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8703 |
2 |
| Air Products and Chemicals, Inc. | 1423 |
2 |
| ATI Properties LLC | 204 |
2 |
| Other owners | 69 |