- 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: 5973
10-year publication summary
|
359
|
367
|
403
|
439
|
521
|
470
|
547
|
559
|
616
|
457
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7074 |
1020 |
| Nippon Steel Corporation | 6514 |
677 |
| POSCO Co., Ltd. | 1601 |
616 |
| ArcelorMittal | 2402 |
605 |
| POSCO | 2173 |
511 |
| Baoshan Iron & Steel Co., Ltd. | 997 |
278 |
| ThyssenKrupp Steel Europe AG | 962 |
146 |
| Hyundai Steel Company | 452 |
111 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
102 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
83 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
72 |
| Salzgitter Flachstahl GmbH | 162 |
70 |
| Nanjing Iron&Steel Co.,Ltd. | 171 |
67 |
| Tata Steel Ijmuiden B.V. | 310 |
65 |
| Voestalpine Stahl GmbH | 366 |
62 |
| ThyssenKrupp AG | 3349 |
53 |
| Nucor Corporation | 421 |
42 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
38 |
| SMS Group GmbH | 1142 |
35 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 63 |
31 |
| Other owners | 1289 |