- 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 1/02 - Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
Patent holdings for IPC class C21D 1/02
Total number of patents in this class: 101
10-year publication summary
|
4
|
8
|
4
|
6
|
4
|
4
|
12
|
15
|
4
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2271 |
18 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
4 |
| ThyssenKrupp Steel Europe AG | 952 |
4 |
| Voestalpine Schienen GmbH | 14 |
4 |
| JFE Steel Corporation | 6809 |
3 |
| Nippon Steel Corporation | 6203 |
3 |
| Outokumpu Oyj | 261 |
3 |
| V & M do Brasil S/A | 5 |
3 |
| MPS Micro Precision Systems AG | 26 |
2 |
| Primetals Technologies Austria GmbH | 530 |
2 |
| Tata Steel Limited | 175 |
2 |
| United States Steel Corporation | 174 |
2 |
| voestalpine Grobblech GmbH, a legal entity | 12 |
2 |
| Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG | 82 |
2 |
| Nanjing Iron&Steel Co.,Ltd. | 163 |
2 |
| United Technologies Corporation | 2247 |
1 |
| Hitachi, Ltd. | 15467 |
1 |
| Robert Bosch GmbH | 42614 |
1 |
| Caterpillar Inc. | 9527 |
1 |
| Yazaki Corporation | 6648 |
1 |
| Other owners | 40 |