- All sections
- C - Chemistry; metallurgy
- 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: 173
10-year publication summary
|
15
|
14
|
3
|
10
|
8
|
7
|
6
|
19
|
12
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Paul Wurth S.A. | 392 |
28 |
| JFE Steel Corporation | 6067 |
16 |
| ArcelorMittal | 1887 |
11 |
| POSCO | 2222 |
7 |
| Nippon Steel Corporation | 5649 |
5 |
| Danieli Corus BV | 28 |
4 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
4 |
| Seoul Engineering Co., Ltd. | 10 |
4 |
| Tata Steel Limited | 184 |
4 |
| Paul Wurth Deutschland GmbH | 28 |
4 |
| Siemens VAI Metals Technologies GmbH | 233 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
3 |
| Nippon Steel Engineering Co., Ltd. | 218 |
3 |
| Subcoal International B.V. | 13 |
3 |
| Shanghai University | 66 |
3 |
| Changli Xingguo Precision Parts Co., Ltd | 4 |
3 |
| Somerset Ipco, LLC. | 4 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
2 |
| Air Products and Chemicals, Inc. | 1448 |
2 |
| ATI Properties LLC | 202 |
2 |
| Other owners | 59 |