- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 5/12 - Dry processes by gases
Patent holdings for IPC class C22B 5/12
Total number of patents in this class: 263
10-year publication summary
|
10
|
8
|
11
|
14
|
10
|
8
|
26
|
23
|
26
|
40
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GreenIron H2 AB | 32 |
18 |
| Carbon Technology Holdings, LLC | 215 |
12 |
| Korea Zinc Co., Ltd. | 89 |
9 |
| Metso Metals Oy | 208 |
9 |
| Kemco | 35 |
9 |
| JFE Steel Corporation | 6916 |
8 |
| Nippon Steel Corporation | 6334 |
7 |
| Luossavaara-Kiirunavaara AB | 116 |
6 |
| SMS Group GmbH | 1131 |
6 |
| Pukyong National University Industry-University Cooperation Foundation | 347 |
5 |
| Technological Resources Pty. Limited | 457 |
5 |
| Umicore | 658 |
5 |
| Hybrit Development AB | 61 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2877 |
4 |
| Outotec Oyj | 278 |
4 |
| POSCO | 2183 |
4 |
| Primetals Technologies Austria GmbH | 539 |
4 |
| Sumitomo Metal Mining Co., Ltd. | 1788 |
4 |
| Omnis Advanced Technologies, LLC | 14 |
4 |
| Heraeus Deutschland GmbH & Co. KG | 418 |
3 |
| Other owners | 132 |