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  • 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 1/84 - Controlled slow cooling

Patent holdings for IPC class C21D 1/84

Total number of patents in this class: 178

10-year publication summary

31
2
8
3
9
3
7
20
65
21
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
POSCO Co., Ltd.
1558
28
Baoshan Iron & Steel Co., Ltd.
959
18
JFE Steel Corporation
6809
17
Nippon Steel Corporation
6203
17
ArcelorMittal
2271
12
The Boeing Company
20031
3
Salzgitter Flachstahl GmbH
158
3
Jiangsu Shagang Group Co., Ltd.
90
3
Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd
64
3
GM Global Technology Operations LLC
14937
2
Northwestern University
3374
2
Aperam
118
2
Daido Steel Co., Ltd.
269
2
Hyundai Steel Company
425
2
ThyssenKrupp Steel Europe AG
952
2
Voestalpine Stahl GmbH
354
2
Tecniforja - Forjagem e Estampagem de Peças Técnicas, Lda
3
2
NIPPON STEEL Stainless Steel Corporation
287
2
Daye Special Steel Co., Ltd.
17
2
Siemens AG
24525
1
Other owners 53

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