- All sections
- C - Chemistrymetallurgy
- C21D - Modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or non-ferrous metals or alloysmaking metal malleable, e.g. by decarburisation or tempering
- C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
Patent holdings for IPC class C21D 8/12
Total number of patents in this class: 2269
10-year publication summary
|
108
|
135
|
143
|
173
|
142
|
217
|
174
|
231
|
268
|
157
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7589 |
639 |
| Nippon Steel Corporation | 6932 |
500 |
| POSCO Co., Ltd. | 2021 |
239 |
| POSCO | 2141 |
174 |
| ArcelorMittal | 2714 |
93 |
| Baoshan Iron & Steel Co., Ltd. | 1114 |
90 |
| Hyundai Steel Company | 539 |
62 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
53 |
| ThyssenKrupp Steel Europe AG | 995 |
20 |
| Proterial, Ltd. | 939 |
20 |
| ThyssenKrupp Electrical Steel GmbH | 30 |
19 |
| Vacuumschmelze GmbH & Co. KG | 257 |
16 |
| ThyssenKrupp AG | 3353 |
14 |
| Aperam | 142 |
12 |
| Jiangsu Shagang Group Co., Ltd. | 115 |
12 |
| SMS Group GmbH | 1206 |
11 |
| Tateho Chemical Industries Co., Ltd. | 60 |
10 |
| Centro Sviluppo Materiali S.p.A. | 24 |
9 |
| MM Metals USA, LLC | 14 |
9 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 81 |
9 |
| Other owners | 258 |