- 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 5/00 - Heat treatment of cast-iron
Patent holdings for IPC class C21D 5/00
Total number of patents in this class: 121
10-year publication summary
|
9
|
13
|
5
|
2
|
11
|
5
|
9
|
5
|
1
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1982 |
7 |
| Hyundai Motor Company | 21987 |
5 |
| Robert Bosch GmbH | 42689 |
4 |
| Zanardi Fonderie S.p.A. | 7 |
4 |
| JFE Steel Corporation | 6840 |
3 |
| Toshiba Kikai Kabushiki Kaisha | 285 |
3 |
| UD Trucks Corporation | 123 |
3 |
| Wartsila Finland Oy | 741 |
3 |
| Indexator AB | 5 |
3 |
| Nippon Steel Rolls Corporation | 5 |
3 |
| Caterpillar Inc. | 9548 |
2 |
| Kia Motors Corporation | 7754 |
2 |
| Brembo S.p.A. | 475 |
2 |
| Federal-Mogul Burscheid GmbH | 283 |
2 |
| Hinode, Ltd. | 15 |
2 |
| Kabushiki Kaisha Riken | 285 |
2 |
| L.E. Jones Company, LLC | 18 |
2 |
| TDI Value Web B.V. | 2 |
2 |
| Tenneco Inc | 280 |
2 |
| GE Infrastructure Technology, LLC | 6222 |
2 |
| Other owners | 63 |