- 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: 155
10-year publication summary
|
14
|
8
|
12
|
15
|
8
|
12
|
27
|
17
|
23
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6207 |
51 |
| JFE Steel Corporation | 6816 |
22 |
| POSCO Co., Ltd. | 1559 |
16 |
| POSCO | 2186 |
10 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
8 |
| ArcelorMittal | 2272 |
7 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
5 |
| Hyundai Steel Company | 426 |
2 |
| Kobe Steel, Ltd. | 871 |
2 |
| Messier-Bugatti-Dowty | 227 |
2 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
2 |
| Salzgitter Flachstahl GmbH | 158 |
2 |
| SMS Group GmbH | 1118 |
2 |
| Tateho Chemical Industries Co., Ltd. | 60 |
2 |
| ThyssenKrupp Steel Europe AG | 954 |
2 |
| GM Global Technology Operations LLC | 14968 |
1 |
| Nissan Motor Co., Ltd. | 12458 |
1 |
| Hyundai Motor Company | 21897 |
1 |
| Kia Motors Corporation | 7757 |
1 |
| Asada Katan Chutetu-syo Co., Ltd. | 2 |
1 |
| Other owners | 15 |