- All sections
- C - Chemistry; metallurgy
- 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: 128
10-year publication summary
|
22
|
9
|
4
|
6
|
2
|
3
|
9
|
9
|
6
|
0
|
| 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 | 2675 |
12 |
| Nu-Iron Technology, LLC | 39 |
6 |
| Technological Resources Pty. Limited | 443 |
6 |
| Hazer Group Ltd | 14 |
4 |
| ArcelorMittal | 2052 |
3 |
| Freeport Minerals Corporation | 90 |
3 |
| Korea Zinc Co., Ltd. | 63 |
3 |
| Helios Project Ltd. | 11 |
3 |
| Austpac Resources N.L. | 3 |
2 |
| Biosigma S.A. | 13 |
2 |
| JFE Steel Corporation | 6538 |
2 |
| Great Western Iron Ore Properties Inc. | 2 |
2 |
| AEM Canada Group Inc. | 13 |
2 |
| Electrasteel, Inc. | 34 |
2 |
| Negative Emissions Materials, Inc. | 12 |
2 |
| Xerox Corporation | 7076 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2722 |
1 |
| Air Products and Chemicals, Inc. | 1426 |
1 |
| Korea Institute of Science and Technology | 2069 |
1 |
| Barrick Gold Corporation | 73 |
1 |
| Other owners | 69 |