- All sections
- C - Chemistry; metallurgy
- C21B - Manufacture of iron or steel
- C21B 9/14 - Preheating the combustion air
Patent holdings for IPC class C21B 9/14
Total number of patents in this class: 21
10-year publication summary
|
3
|
1
|
2
|
0
|
0
|
1
|
2
|
2
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Paul Wurth S.A. | 410 |
5 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3599 |
2 |
| Nippon Steel & Sumikin Engineering Co., Ltd. | 185 |
2 |
| ThyssenKrupp Steel Europe AG | 956 |
2 |
| Paul Wurth Deutschland GmbH | 28 |
2 |
| Alstom Technology Ltd | 1145 |
1 |
| Air Products and Chemicals, Inc. | 1435 |
1 |
| L'Air Liquide, Societe Anonyme pour L'etude et L'exploitation des Proced ES Georges Claude | 304 |
1 |
| Linde Aktiengesellschaft | 1549 |
1 |
| Midrex Technologies, Inc. | 103 |
1 |
| Paul Wurth Refractory & Engineering GmbH | 12 |
1 |
| Primetals Technologies, Limited | 32 |
1 |
| Research Institute of Industrial Science & Technology | 449 |
1 |
| Other owners | 0 |