- 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 9/663 - Bell-type furnaces
Patent holdings for IPC class C21D 9/663
Total number of patents in this class: 27
10-year publication summary
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3
|
1
|
1
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2
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2
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0
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4
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1
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2
|
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
|
|---|---|---|
| LOI Thermprocess GmbH | 37 |
3 |
| Ebner Industrieofenbau GmbH | 142 |
2 |
| Nippon Steel Corporation | 6231 |
2 |
| SABIC Global Technologies B.V. | 4335 |
2 |
| Salzgitter Flachstahl GmbH | 159 |
2 |
| Linde GmbH | 1261 |
2 |
| Siemens AG | 24505 |
1 |
| Siemens Industry, Inc. | 1447 |
1 |
| Beijing GoldWind Science & Creation Windpower Equipment Co., Ltd. | 367 |
1 |
| POSCO | 2187 |
1 |
| Rautaruukki Oyj | 148 |
1 |
| SMS Group GmbH | 1124 |
1 |
| ThyssenKrupp AG | 3281 |
1 |
| ThyssenKrupp Steel Europe AG | 954 |
1 |
| C.O.P.S. International GmbH | 1 |
1 |
| thyssenkrupp Hohenlimburg GmbH | 17 |
1 |
| LAC, s.r.o. | 3 |
1 |
| Evonik Operations GmbH | 4095 |
1 |
| Reinhold Mendritzki Kaltwalzwerk GmbH & Co. KG | 7 |
1 |
| IperionX Limited | 7 |
1 |
| Other owners | 0 |