- All sections
- C - Chemistry; metallurgy
- C21D - Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making metal malleable, e.g. by decarburisation or tempering
- C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
Patent holdings for IPC class C21D 8/04
Total number of patents in this class: 661
10-year publication summary
|
59
|
55
|
52
|
59
|
61
|
52
|
57
|
50
|
28
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 1887 |
118 |
| JFE Steel Corporation | 6067 |
77 |
| Nippon Steel Corporation | 5649 |
50 |
| ThyssenKrupp Steel Europe AG | 924 |
41 |
| Tata Steel Ijmuiden B.V. | 283 |
30 |
| POSCO Co., Ltd. | 1059 |
21 |
| ThyssenKrupp AG | 3086 |
18 |
| Voestalpine Stahl GmbH | 311 |
16 |
| POSCO | 2222 |
15 |
| Salzgitter Flachstahl GmbH | 155 |
15 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
13 |
| ThyssenKrupp Rasselstein GmbH | 72 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
11 |
| Tata Steel Nederland Technology BV | 143 |
10 |
| Kobe Steel, Ltd. | 912 |
9 |
| SMS Group GmbH | 1029 |
9 |
| Hyundai Steel Company | 310 |
8 |
| ThyssenKrupp Steel AG | 80 |
8 |
| AK Steel Properties, Inc. | 75 |
7 |
| ArcelorMittal France | 102 |
7 |
| Other owners | 166 |