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  • 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
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

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