- 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: 306
10-year publication summary
|
16
|
12
|
9
|
10
|
4
|
18
|
11
|
25
|
26
|
33
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6998 |
49 |
| Paul Wurth S.A. | 419 |
22 |
| ThyssenKrupp AG | 3320 |
20 |
| Nippon Steel Corporation | 6414 |
17 |
| ArcelorMittal | 2349 |
16 |
| Mitsubishi Heavy Industries, Ltd. | 8832 |
13 |
| Nippon Steel Engineering Co., Ltd. | 205 |
9 |
| Siemens VAI Metals Technologies GmbH | 216 |
8 |
| Danieli Corus BV | 26 |
8 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3997 |
8 |
| CCP Technology GmbH | 22 |
5 |
| Primetals Technologies Austria GmbH | 546 |
5 |
| Cisdi Engineering Co., Ltd. | 101 |
4 |
| ThyssenKrupp Industrial Solutions AG | 632 |
4 |
| ThyssenKrupp Steel Europe AG | 962 |
4 |
| ThyssenKrupp Uhde GmbH | 339 |
4 |
| 8 Rivers Capital, LLC | 237 |
3 |
| Ecolab USA Inc. | 5548 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2882 |
3 |
| Nippon Steel & Sumikin Engineering Co., Ltd. | 184 |
3 |
| Other owners | 98 |