- 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: 930
10-year publication summary
|
48
|
63
|
45
|
51
|
57
|
84
|
76
|
92
|
135
|
66
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2714 |
151 |
| JFE Steel Corporation | 7589 |
92 |
| Baoshan Iron & Steel Co., Ltd. | 1114 |
83 |
| Nippon Steel Corporation | 6932 |
36 |
| POSCO Co., Ltd. | 2021 |
24 |
| Voestalpine Stahl GmbH | 390 |
21 |
| Salzgitter Flachstahl GmbH | 163 |
16 |
| ThyssenKrupp Steel Europe AG | 995 |
15 |
| United States Steel Corporation | 173 |
12 |
| Hitachi Metals, Ltd. | 1826 |
11 |
| Wisdri Engineering & Research Incorporation Limited | 230 |
11 |
| POSCO | 2141 |
9 |
| General Electric Company | 13915 |
8 |
| Aperam | 142 |
7 |
| Outokumpu Oyj | 267 |
7 |
| ThyssenKrupp Rasselstein GmbH | 71 |
7 |
| voestalpine Böhler Edelstahl GmbH & Co KG | 65 |
7 |
| ATI Properties LLC | 200 |
6 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
6 |
| ArcelorMittal Wire France | 41 |
5 |
| Other owners | 396 |