- 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: 1220
10-year publication summary
|
106
|
86
|
78
|
85
|
92
|
98
|
57
|
94
|
59
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6673 |
177 |
| JFE Steel Corporation | 7259 |
118 |
| ArcelorMittal | 2510 |
65 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
50 |
| Baoshan Iron & Steel Co., Ltd. | 1065 |
44 |
| POSCO Co., Ltd. | 1649 |
41 |
| POSCO | 2155 |
28 |
| ThyssenKrupp Steel Europe AG | 977 |
17 |
| Hitachi Metals, Ltd. | 1930 |
14 |
| Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. | 76 |
12 |
| Hyundai Motor Company | 23447 |
11 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2842 |
11 |
| ThyssenKrupp AG | 3448 |
11 |
| ATI Properties LLC | 201 |
10 |
| Magna International Inc. | 1203 |
10 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
10 |
| Proterial, Ltd. | 916 |
10 |
| Daido Steel Co., Ltd. | 278 |
9 |
| Hyundai Steel Company | 480 |
9 |
| Schwartz GmbH | 58 |
9 |
| Other owners | 554 |