- 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 1/72 - Temporary coatings or embedding materials applied before or during heat treatment during chemical change of surfaces
Patent holdings for IPC class C21D 1/72
Total number of patents in this class: 39
10-year publication summary
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2
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1
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3
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0
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2
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2
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1
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3
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0
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1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO | 2142 |
4 |
| Tata Steel Ijmuiden B.V. | 328 |
4 |
| Toyota Motor Corporation | 35813 |
3 |
| Shougang Zhixin Electromagnetic Materials (qian'an) Co., Ltd. | 6 |
3 |
| NOVA Chemicals (International) S.A. | 799 |
2 |
| POSCO Co., Ltd. | 2015 |
2 |
| POSTECH Academy-industry Foundation | 1063 |
2 |
| Tata Steel Nederland Technology BV | 161 |
2 |
| Robert Bosch GmbH | 44176 |
1 |
| ALCAN Rhenalu | 13 |
1 |
| Areva NP | 201 |
1 |
| Industry-University Cooperation Foundation Hanyang University | 1010 |
1 |
| JFE Steel Corporation | 7549 |
1 |
| MEC International Co., Ltd. | 15 |
1 |
| Momentive Specialty Chemicals Inc. | 55 |
1 |
| MTU Aero Engines AG | 730 |
1 |
| The NanoSteel Company, Inc. | 52 |
1 |
| Nippon Steel Corporation | 6895 |
1 |
| NV Bekaert SA | 725 |
1 |
| Research Institute of Industrial Science & Technology | 569 |
1 |
| Other owners | 5 |