- 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 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: 666
10-year publication summary
|
50
|
52
|
56
|
47
|
52
|
44
|
26
|
16
|
11
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2526 |
124 |
| JFE Steel Corporation | 7349 |
77 |
| Nippon Steel Corporation | 6692 |
52 |
| ThyssenKrupp Steel Europe AG | 984 |
40 |
| Tata Steel Ijmuiden B.V. | 319 |
30 |
| POSCO Co., Ltd. | 1658 |
28 |
| Voestalpine Stahl GmbH | 384 |
16 |
| POSCO | 2155 |
15 |
| ThyssenKrupp Rasselstein GmbH | 72 |
15 |
| Salzgitter Flachstahl GmbH | 162 |
14 |
| ThyssenKrupp AG | 3458 |
14 |
| Baoshan Iron & Steel Co., Ltd. | 1074 |
13 |
| ArcelorMittal Investigacion y Desarrollo SL | 208 |
10 |
| Tata Steel Nederland Technology BV | 156 |
10 |
| SMS Group GmbH | 1167 |
9 |
| Hyundai Steel Company | 496 |
8 |
| Kobe Steel, Ltd. | 895 |
8 |
| AK Steel Properties, Inc. | 75 |
7 |
| ArcelorMittal France | 73 |
7 |
| ThyssenKrupp Steel AG | 37 |
6 |
| Other owners | 163 |