- 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
3
|
1
|
1
|
2
|
2
|
0
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4
|
1
|
2
|
1
|
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 | 6203 |
2 |
SABIC Global Technologies B.V. | 4326 |
2 |
Salzgitter Flachstahl GmbH | 158 |
2 |
Linde GmbH | 1257 |
2 |
Siemens AG | 24525 |
1 |
Siemens Industry, Inc. | 1447 |
1 |
Beijing GoldWind Science & Creation Windpower Equipment Co., Ltd. | 366 |
1 |
POSCO | 2188 |
1 |
Rautaruukki Oyj | 149 |
1 |
SMS Group GmbH | 1118 |
1 |
ThyssenKrupp AG | 3276 |
1 |
ThyssenKrupp Steel Europe AG | 952 |
1 |
C.O.P.S. International GmbH | 1 |
1 |
thyssenkrupp Hohenlimburg GmbH | 17 |
1 |
LAC, s.r.o. | 3 |
1 |
Evonik Operations GmbH | 4083 |
1 |
Reinhold Mendritzki Kaltwalzwerk GmbH & Co. KG | 7 |
1 |
IperionX Limited | 7 |
1 |
Other owners | 0 |