- 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: 38
10-year publication summary
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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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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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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO | 2173 |
4 |
| Tata Steel Ijmuiden B.V. | 310 |
4 |
| Toyota Motor Corporation | 33519 |
3 |
| NOVA Chemicals (International) S.A. | 787 |
2 |
| POSCO Co., Ltd. | 1601 |
2 |
| POSTECH Academy-industry Foundation | 1084 |
2 |
| Tata Steel Nederland Technology BV | 153 |
2 |
| Shougang Zhixin Electromagnetic Materials (qian'an) Co., Ltd. | 4 |
2 |
| Robert Bosch GmbH | 43096 |
1 |
| ALCAN Rhenalu | 18 |
1 |
| Areva NP | 208 |
1 |
| Industry-University Cooperation Foundation Hanyang University | 1014 |
1 |
| JFE Steel Corporation | 7074 |
1 |
| MEC International Co., Ltd. | 14 |
1 |
| Momentive Specialty Chemicals Inc. | 55 |
1 |
| MTU Aero Engines AG | 699 |
1 |
| The NanoSteel Company, Inc. | 55 |
1 |
| Nippon Steel Corporation | 6514 |
1 |
| NV Bekaert SA | 742 |
1 |
| Research Institute of Industrial Science & Technology | 509 |
1 |
| Other owners | 5 |