- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 7/22 - Dust arresters
Patent holdings for IPC class C21B 7/22
Total number of patents in this class: 25
10-year publication summary
|
6
|
1
|
1
|
1
|
3
|
1
|
2
|
0
|
0
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Danieli Corus BV | 25 |
6 |
| Paul Wurth S.A. | 432 |
4 |
| Wisdri Engineering & Research Incorporation Limited | 222 |
4 |
| Siemens VAI Metals Technologies GmbH | 204 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 9115 |
1 |
| Cisdi Engineering Co., Ltd. | 107 |
1 |
| HYL Technologies, S.A. de C.V. | 46 |
1 |
| Institute of Process Engineering, Chinese Academy of Sciences | 328 |
1 |
| Nippon Steel & Sumikin Engineering Co., Ltd. | 169 |
1 |
| POSCO | 2147 |
1 |
| POSCO Co., Ltd. | 2006 |
1 |
| Primetals Technologies Austria GmbH | 573 |
1 |
| Hebei Chuangjie Environmental Protection Engineering Co., Ltd. | 1 |
1 |
| Other owners | 0 |