- 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 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
Patent holdings for IPC class C21D 8/06
Total number of patents in this class: 1000
10-year publication summary
|
88
|
73
|
33
|
60
|
69
|
79
|
57
|
65
|
94
|
31
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6692 |
143 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
94 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
71 |
| POSCO | 2155 |
53 |
| POSCO Co., Ltd. | 1658 |
52 |
| JFE Steel Corporation | 7349 |
41 |
| Hyundai Steel Company | 496 |
25 |
| Baoshan Iron & Steel Co., Ltd. | 1074 |
20 |
| NV Bekaert SA | 728 |
20 |
| NHK Spring Co., Ltd. | 1934 |
19 |
| Sumitomo Electric Industries, Ltd. | 16091 |
16 |
| ArcelorMittal | 2526 |
13 |
| NIPPON STEEL Stainless Steel Corporation | 278 |
13 |
| Compagnie Generale des Etablissements Michelin | 4885 |
11 |
| Michelin Recherche et Technique S.A. | 2109 |
9 |
| Daido Steel Co., Ltd. | 280 |
9 |
| Nippon Steel SG Wire Co., Ltd. | 14 |
9 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 63 |
8 |
| Nanjing Iron&Steel Co.,Ltd. | 181 |
8 |
| Jiangsu Shagang Group Co., Ltd. | 109 |
8 |
| Other owners | 358 |