- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 11/02 - Making pig-iron other than in blast furnaces in low shaft furnaces
Patent holdings for IPC class C21B 11/02
Total number of patents in this class: 66
10-year publication summary
|
5
|
3
|
3
|
1
|
0
|
6
|
4
|
5
|
2
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Midrex Technologies, Inc. | 109 |
10 |
| JFE Steel Corporation | 6840 |
6 |
| Nippon Steel Corporation | 6238 |
6 |
| Tecnored Desenvolvimento Tecnologico S.A. | 34 |
5 |
| Kuettner GmbH & Co. KG | 5 |
4 |
| Paul Wurth S.A. | 419 |
4 |
| Air Liquide Deutschland G.m.b.H | 62 |
2 |
| Danieli & C. Officine Meccaniche S.p.A. | 714 |
2 |
| Grede LLC | 12 |
2 |
| Hatch Ltd. | 214 |
2 |
| HYL Technologies, S.A. de C.V. | 43 |
2 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3975 |
2 |
| TMT - Tapping Measuring Technology SARL | 35 |
2 |
| Helios Project Ltd. | 19 |
2 |
| Aisin Takaoka Co., Ltd. | 97 |
1 |
| Air Products and Chemicals, Inc. | 1423 |
1 |
| Eco'ring | 15 |
1 |
| Eurecat S.A. | 88 |
1 |
| Inter-university Research Institute Corporation National Institutes of Natural Sciences | 153 |
1 |
| POSCO Co., Ltd. | 1568 |
1 |
| Other owners | 9 |