- 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 3/04 - Decarburising
Patent holdings for IPC class C21D 3/04
Total number of patents in this class: 161
10-year publication summary
|
14
|
8
|
12
|
15
|
8
|
12
|
28
|
15
|
23
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6514 |
53 |
| JFE Steel Corporation | 7074 |
22 |
| POSCO Co., Ltd. | 1601 |
16 |
| POSCO | 2173 |
10 |
| Baoshan Iron & Steel Co., Ltd. | 997 |
9 |
| ArcelorMittal | 2402 |
7 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
5 |
| Hyundai Steel Company | 452 |
2 |
| Kobe Steel, Ltd. | 882 |
2 |
| Messier-Bugatti-Dowty | 226 |
2 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
2 |
| Salzgitter Flachstahl GmbH | 162 |
2 |
| SMS Group GmbH | 1142 |
2 |
| Tateho Chemical Industries Co., Ltd. | 59 |
2 |
| ThyssenKrupp Steel Europe AG | 962 |
2 |
| Shougang Zhixin Electromagnetic Materials (qian'an) Co., Ltd. | 4 |
2 |
| GM Global Technology Operations LLC | 15401 |
1 |
| Nissan Motor Co., Ltd. | 12673 |
1 |
| Hyundai Motor Company | 22842 |
1 |
| Kia Motors Corporation | 7743 |
1 |
| Other owners | 17 |