- 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 9/67 - Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
Patent holdings for IPC class C21D 9/67
Total number of patents in this class: 11
10-year publication summary
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0
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0
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2
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0
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1
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| AK Steel Properties, Inc. | 75 |
2 |
| ALD Vacuum Technologies GmbH | 139 |
2 |
| Kawasaki Heavy Industries, Limited | 1627 |
1 |
| Ebner Industrieofenbau GmbH | 142 |
1 |
| Firth Rixson Limited | 4 |
1 |
| Ipsen International GmbH | 38 |
1 |
| LOI Thermprocess GmbH | 37 |
1 |
| Cleveland-Cliffs Steel Properties Inc. | 73 |
1 |
| Cleveland-Cliffs Steel Properties | 17 |
1 |
| Other owners | 0 |