- 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: 61
10-year publication summary
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8
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8
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6
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3
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1
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5
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2
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6
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4
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2
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Aktiebolaget SKF | 3091 |
5 |
| Nippon Steel Corporation | 6738 |
5 |
| Schaeffler Technologies AG & Co. KG | 10761 |
4 |
| JFE Steel Corporation | 7378 |
4 |
| Nippon Steel Rolls Corporation | 5 |
4 |
| Hitachi Metals, Ltd. | 1917 |
3 |
| NTN Corporation | 4934 |
2 |
| Fujico Co., Ltd. | 17 |
2 |
| Sumitomo Heavy Industries Himatex Co., Ltd. | 3 |
2 |
| Kanagawa Institute of Industrial Science and Technology | 121 |
2 |
| Jiangsu Runfu Mechanical Roll Manufacturing Co., Ltd | 6 |
2 |
| Rtx Corporation | 9916 |
2 |
| Siemens AG | 24177 |
1 |
| ZF Friedrichshafen AG | 7220 |
1 |
| Komatsu Ltd. | 4658 |
1 |
| Bauman Moscow State Technical University (BMSTU) | 16 |
1 |
| Bharat Forge Ltd. | 48 |
1 |
| Contemporary Amperex Technology Co., Limited | 9185 |
1 |
| Danmarks Tekniske Universitet | 1017 |
1 |
| Duma-bandzink GmbH | 3 |
1 |
| Other owners | 16 |