- 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: 722
10-year publication summary
105
|
48
|
63
|
45
|
50
|
56
|
81
|
69
|
81
|
9
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6587 |
83 |
ArcelorMittal | 2077 |
69 |
Baoshan Iron & Steel Co., Ltd. | 902 |
66 |
Nippon Steel Corporation | 6031 |
22 |
Voestalpine Stahl GmbH | 347 |
20 |
POSCO Co., Ltd. | 1314 |
19 |
ThyssenKrupp Steel Europe AG | 955 |
15 |
Hitachi Metals, Ltd. | 2017 |
13 |
Salzgitter Flachstahl GmbH | 155 |
12 |
United States Steel Corporation | 174 |
10 |
POSCO | 2204 |
9 |
Wisdri Engineering & Research Incorporation Limited | 181 |
9 |
ThyssenKrupp Rasselstein GmbH | 73 |
8 |
General Electric Company | 17800 |
7 |
ATI Properties LLC | 205 |
6 |
Outokumpu Oyj | 251 |
6 |
ArcelorMittal Wire France | 42 |
5 |
DENTSPLY SIRONA Inc. | 1871 |
5 |
Novelis Inc. | 704 |
5 |
Dai-Ichi High Frequency Co., Ltd. | 34 |
4 |
Other owners | 329 |