- All sections
- C - Chemistry; metallurgy
- 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: 212
10-year publication summary
26
|
12
|
6
|
4
|
9
|
5
|
10
|
30
|
25
|
9
|
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 |
29 |
ThyssenKrupp AG | 3086 |
20 |
ArcelorMittal | 1887 |
18 |
JFE Steel Corporation | 6067 |
14 |
Siemens VAI Metals Technologies GmbH | 233 |
10 |
HYL Technologies, S.A. de C.V. | 41 |
8 |
L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
8 |
Danieli & C. Officine Meccaniche S.p.A. | 680 |
5 |
Nippon Steel Corporation | 5649 |
5 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
4 |
CCP Technology GmbH | 23 |
4 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
Linde Aktiengesellschaft | 1600 |
4 |
Sekisui Chemical Co., Ltd. | 3159 |
4 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
3 |
Cisdi Engineering Co., Ltd. | 86 |
3 |
L'Air Liquide, Societe Anonyme pour L'etude et L'exploitation des Proced ES Georges Claude | 296 |
3 |
Midrex Technologies, Inc. | 103 |
3 |
Nippon Steel Engineering Co., Ltd. | 218 |
3 |
Nippon Steel & Sumikin Engineering Co., Ltd. | 186 |
3 |
Other owners | 57 |