- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 7/00 - Blast furnaces
Patent holdings for IPC class C21B 7/00
Total number of patents in this class: 317
10-year publication summary
|
13
|
9
|
10
|
4
|
22
|
12
|
31
|
26
|
36
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7362 |
49 |
| ArcelorMittal | 2532 |
25 |
| Paul Wurth S.A. | 430 |
22 |
| ThyssenKrupp AG | 3454 |
20 |
| Nippon Steel Corporation | 6703 |
19 |
| Mitsubishi Heavy Industries, Ltd. | 9023 |
13 |
| Nippon Steel Engineering Co., Ltd. | 178 |
9 |
| Siemens VAI Metals Technologies GmbH | 206 |
8 |
| Danieli Corus BV | 25 |
7 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 4053 |
6 |
| CCP Technology GmbH | 22 |
5 |
| Cisdi Engineering Co., Ltd. | 105 |
5 |
| Primetals Technologies Austria GmbH | 566 |
5 |
| ThyssenKrupp Industrial Solutions AG | 630 |
4 |
| ThyssenKrupp Steel Europe AG | 984 |
4 |
| ThyssenKrupp Uhde GmbH | 375 |
4 |
| 8 Rivers Capital, LLC | 235 |
3 |
| Ecolab USA Inc. | 5732 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2835 |
3 |
| Midrex Technologies, Inc. | 112 |
3 |
| Other owners | 100 |