- 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 9/56 - Continuous furnaces for strip or wire
Patent holdings for IPC class C21D 9/56
Total number of patents in this class: 514
10-year publication summary
|
35
|
47
|
34
|
43
|
55
|
42
|
32
|
30
|
34
|
19
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
119 |
| ArcelorMittal | 1887 |
38 |
| Nippon Steel Corporation | 5649 |
26 |
| Fives Stein | 96 |
18 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
17 |
| SMS Group GmbH | 1029 |
17 |
| Chugai Ro Co., Ltd. | 124 |
14 |
| Andritz Technology and Asset Management GmbH | 89 |
13 |
| ThyssenKrupp Steel Europe AG | 924 |
11 |
| POSCO Co., Ltd. | 1059 |
10 |
| Cockerill Maintenance & Ingenierie SA | 82 |
8 |
| POSCO | 2222 |
8 |
| ThyssenKrupp AG | 3086 |
7 |
| Primetals Technologies Japan, Ltd. | 143 |
6 |
| Vacuumschmelze GmbH & Co. KG | 253 |
6 |
| Hitachi Metals, Ltd. | 2175 |
5 |
| Siemens VAI Metals Technologies SAS | 70 |
5 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
5 |
| Tocalo Co., Ltd. | 94 |
5 |
| Ebner Industrieofenbau GmbH | 132 |
4 |
| Other owners | 172 |