- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 5/06 - Making pig-iron in the blast furnace using top gas in the blast furnace process
Patent holdings for IPC class C21B 5/06
Total number of patents in this class: 254
10-year publication summary
|
12
|
6
|
4
|
9
|
5
|
10
|
30
|
30
|
32
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Paul Wurth S.A. | 417 |
34 |
| ArcelorMittal | 2254 |
26 |
| ThyssenKrupp AG | 3273 |
22 |
| JFE Steel Corporation | 6806 |
20 |
| Siemens VAI Metals Technologies GmbH | 222 |
10 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3949 |
10 |
| HYL Technologies, S.A. de C.V. | 44 |
8 |
| Nippon Steel Corporation | 6195 |
6 |
| Danieli & C. Officine Meccaniche S.p.A. | 713 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
5 |
| Primetals Technologies Austria GmbH | 529 |
5 |
| Mitsubishi Heavy Industries, Ltd. | 8664 |
4 |
| CCP Technology GmbH | 23 |
4 |
| Linde Aktiengesellschaft | 1517 |
4 |
| Sekisui Chemical Co., Ltd. | 3381 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
3 |
| Cisdi Engineering Co., Ltd. | 99 |
3 |
| Midrex Technologies, Inc. | 109 |
3 |
| Nippon Steel Engineering Co., Ltd. | 205 |
3 |
| Nippon Steel & Sumikin Engineering Co., Ltd. | 184 |
3 |
| Other owners | 72 |