- 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 9/38 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for roll bodies
Patent holdings for IPC class C21D 9/38
Total number of patents in this class: 56
10-year publication summary
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5
|
8
|
8
|
6
|
3
|
1
|
5
|
2
|
5
|
0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Aktiebolaget SKF | 2921 |
5 |
| JFE Steel Corporation | 6767 |
4 |
| Nippon Steel Rolls Corporation | 5 |
4 |
| Hitachi Metals, Ltd. | 1990 |
3 |
| Nippon Steel Corporation | 6166 |
3 |
| Schaeffler Technologies AG & Co. KG | 9747 |
2 |
| NTN Corporation | 4974 |
2 |
| Fujico Co., Ltd. | 17 |
2 |
| Sumitomo Heavy Industries Himatex Co., Ltd. | 3 |
2 |
| Kanagawa Institute of Industrial Science and Technology | 111 |
2 |
| Jiangsu Runfu Mechanical Roll Manufacturing Co., Ltd | 6 |
2 |
| Rtx Corporation | 9297 |
2 |
| Siemens AG | 24561 |
1 |
| ZF Friedrichshafen AG | 7118 |
1 |
| Komatsu Ltd. | 4505 |
1 |
| Bauman Moscow State Technical University (BMSTU) | 16 |
1 |
| Bharat Forge Ltd. | 35 |
1 |
| Contemporary Amperex Technology Co., Limited | 6343 |
1 |
| Danmarks Tekniske Universitet | 961 |
1 |
| Duma-bandzink GmbH | 2 |
1 |
| Other owners | 15 |