- 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 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
Patent holdings for IPC class C21D 8/02
Total number of patents in this class: 5998
10-year publication summary
|
367
|
403
|
439
|
521
|
471
|
547
|
556
|
615
|
471
|
77
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7213 |
1014 |
| Nippon Steel Corporation | 6616 |
682 |
| POSCO Co., Ltd. | 1638 |
626 |
| ArcelorMittal | 2479 |
603 |
| POSCO | 2154 |
510 |
| Baoshan Iron & Steel Co., Ltd. | 1053 |
288 |
| ThyssenKrupp Steel Europe AG | 972 |
147 |
| Hyundai Steel Company | 475 |
112 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
102 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
80 |
| Salzgitter Flachstahl GmbH | 161 |
70 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2851 |
69 |
| Nanjing Iron&Steel Co.,Ltd. | 177 |
69 |
| Tata Steel Ijmuiden B.V. | 317 |
67 |
| Voestalpine Stahl GmbH | 376 |
64 |
| ThyssenKrupp AG | 3406 |
53 |
| Nucor Corporation | 418 |
38 |
| ArcelorMittal Investigacion y Desarrollo SL | 208 |
37 |
| SMS Group GmbH | 1151 |
35 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 163 |
30 |
| Other owners | 1302 |