- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 15/00 - Other processes for the manufacture of iron from iron compounds
Patent holdings for IPC class C21B 15/00
Total number of patents in this class: 125
10-year publication summary
|
22
|
9
|
4
|
6
|
2
|
3
|
9
|
9
|
6
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ExxonMobil Research And Engineering Company | 2572 |
12 |
| Technological Resources Pty. Limited | 453 |
6 |
| Hazer Group Ltd | 14 |
4 |
| Nu-Iron Technology, LLC | 33 |
4 |
| ArcelorMittal | 2289 |
3 |
| Freeport Minerals Corporation | 108 |
3 |
| Korea Zinc Co., Ltd. | 89 |
3 |
| Helios Project Ltd. | 19 |
3 |
| Biosigma S.A. | 13 |
2 |
| JFE Steel Corporation | 6852 |
2 |
| Vale S.A. | 271 |
2 |
| Form Energy, Inc. | 215 |
2 |
| Great Western Iron Ore Properties Inc. | 2 |
2 |
| AEM Canada Group Inc. | 13 |
2 |
| Electrasteel, Inc. | 39 |
2 |
| Negative Emissions Materials, Inc. | 15 |
2 |
| Xerox Corporation | 7002 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2750 |
1 |
| Air Products and Chemicals, Inc. | 1424 |
1 |
| Korea Institute of Science and Technology | 2120 |
1 |
| Other owners | 67 |