- 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 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
Patent holdings for IPC class C21D 8/00
Total number of patents in this class: 1241
10-year publication summary
|
114
|
94
|
90
|
94
|
97
|
102
|
59
|
98
|
70
|
37
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6871 |
184 |
| JFE Steel Corporation | 7527 |
117 |
| ArcelorMittal | 2672 |
73 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
50 |
| Baoshan Iron & Steel Co., Ltd. | 1102 |
45 |
| POSCO Co., Ltd. | 2012 |
42 |
| POSCO | 2143 |
28 |
| ThyssenKrupp Steel Europe AG | 990 |
17 |
| Hitachi Metals, Ltd. | 1898 |
14 |
| Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | 84 |
12 |
| Proterial, Ltd. | 935 |
12 |
| Hyundai Motor Company | 24653 |
11 |
| Hyundai Steel Company | 531 |
11 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
11 |
| ATI Properties LLC | 200 |
10 |
| Magna International Inc. | 1195 |
10 |
| ThyssenKrupp AG | 3409 |
10 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
10 |
| Daido Steel Co., Ltd. | 284 |
9 |
| Schwartz GmbH | 60 |
9 |
| Other owners | 556 |