- 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: 118
10-year publication summary
|
8
|
4
|
6
|
4
|
4
|
13
|
17
|
5
|
22
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2554 |
26 |
| Baoshan Iron & Steel Co., Ltd. | 1086 |
5 |
| Nippon Steel Corporation | 6738 |
4 |
| Salzgitter Flachstahl GmbH | 163 |
4 |
| ThyssenKrupp Steel Europe AG | 985 |
4 |
| Voestalpine Schienen GmbH | 14 |
4 |
| JFE Steel Corporation | 7378 |
3 |
| Outokumpu Oyj | 261 |
3 |
| V & M do Brasil S/A | 4 |
3 |
| MPS Micro Precision Systems AG | 25 |
2 |
| Primetals Technologies Austria GmbH | 567 |
2 |
| Tata Steel Limited | 162 |
2 |
| United States Steel Corporation | 172 |
2 |
| voestalpine Grobblech GmbH, a legal entity | 12 |
2 |
| Voestalpine Stahl GmbH | 384 |
2 |
| Deutsche Edelstahlwerke Specialty Steel GmbH & Co. KG | 69 |
2 |
| Nanjing Iron&Steel Co.,Ltd. | 183 |
2 |
| United Technologies Corporation | 2220 |
1 |
| Hitachi, Ltd. | 15920 |
1 |
| Robert Bosch GmbH | 43700 |
1 |
| Other owners | 43 |