- 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 1/26 - Methods of annealing
Patent holdings for IPC class C21D 1/26
Total number of patents in this class: 647
10-year publication summary
|
79
|
105
|
48
|
63
|
44
|
50
|
55
|
78
|
65
|
22
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
77 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
59 |
| ArcelorMittal | 1887 |
51 |
| Voestalpine Stahl GmbH | 311 |
18 |
| Nippon Steel Corporation | 5649 |
16 |
| POSCO Co., Ltd. | 1059 |
15 |
| Hitachi Metals, Ltd. | 2175 |
13 |
| ThyssenKrupp Steel Europe AG | 924 |
12 |
| Salzgitter Flachstahl GmbH | 155 |
11 |
| POSCO | 2222 |
9 |
| ThyssenKrupp Rasselstein GmbH | 72 |
8 |
| United States Steel Corporation | 168 |
8 |
| General Electric Company | 18133 |
7 |
| Wisdri Engineering & Research Incorporation Limited | 132 |
7 |
| ATI Properties LLC | 202 |
6 |
| Outokumpu Oyj | 250 |
6 |
| ArcelorMittal Wire France | 40 |
5 |
| DENTSPLY SIRONA Inc. | 1860 |
5 |
| Kobe Steel, Ltd. | 912 |
5 |
| Novelis Inc. | 656 |
5 |
| Other owners | 304 |