- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Patent holdings for IPC class C22C 38/54
Total number of patents in this class: 2151
10-year publication summary
|
193
|
195
|
172
|
200
|
171
|
168
|
216
|
180
|
139
|
151
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6476 |
446 |
| JFE Steel Corporation | 7044 |
351 |
| ArcelorMittal | 2384 |
133 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
104 |
| POSCO Co., Ltd. | 1593 |
78 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2871 |
63 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
63 |
| Baoshan Iron & Steel Co., Ltd. | 985 |
52 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 165 |
47 |
| POSCO | 2176 |
45 |
| Daido Steel Co., Ltd. | 275 |
29 |
| ThyssenKrupp Steel Europe AG | 962 |
25 |
| Nanjing Iron&Steel Co.,Ltd. | 169 |
24 |
| Nisshin Steel Co., Ltd. | 394 |
19 |
| Kobe Steel, Ltd. | 884 |
16 |
| Voestalpine Stahl GmbH | 365 |
15 |
| Hitachi Metals, Ltd. | 1960 |
14 |
| SSAB Technology AB | 160 |
14 |
| ThyssenKrupp AG | 3336 |
14 |
| Hyundai Steel Company | 451 |
13 |
| Other owners | 586 |