- 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 1/26 - Methods of annealing
Patent holdings for IPC class C21D 1/26
Total number of patents in this class: 799
10-year publication summary
|
105
|
48
|
63
|
45
|
51
|
56
|
82
|
69
|
87
|
80
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2285 |
116 |
| JFE Steel Corporation | 6840 |
87 |
| Baoshan Iron & Steel Co., Ltd. | 964 |
68 |
| Nippon Steel Corporation | 6238 |
25 |
| POSCO Co., Ltd. | 1568 |
23 |
| Voestalpine Stahl GmbH | 355 |
21 |
| ThyssenKrupp Steel Europe AG | 955 |
15 |
| Hitachi Metals, Ltd. | 1982 |
13 |
| Salzgitter Flachstahl GmbH | 159 |
12 |
| United States Steel Corporation | 174 |
10 |
| POSCO | 2186 |
9 |
| Wisdri Engineering & Research Incorporation Limited | 210 |
9 |
| ThyssenKrupp Rasselstein GmbH | 72 |
8 |
| General Electric Company | 13780 |
7 |
| ATI Properties LLC | 205 |
6 |
| Outokumpu Oyj | 260 |
6 |
| ArcelorMittal Wire France | 42 |
5 |
| DENTSPLY SIRONA Inc. | 1858 |
5 |
| Novelis Inc. | 750 |
5 |
| Dai-Ichi High Frequency Co., Ltd. | 34 |
4 |
| Other owners | 345 |