- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Patent holdings for IPC class C22C 38/28
Total number of patents in this class: 2311
10-year publication summary
|
200
|
202
|
233
|
167
|
142
|
178
|
230
|
224
|
188
|
143
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6895 |
321 |
| JFE Steel Corporation | 7549 |
305 |
| POSCO Co., Ltd. | 2015 |
286 |
| ArcelorMittal | 2680 |
238 |
| POSCO | 2142 |
132 |
| Baoshan Iron & Steel Co., Ltd. | 1104 |
117 |
| Hyundai Steel Company | 535 |
71 |
| ThyssenKrupp Steel Europe AG | 992 |
66 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
40 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 156 |
31 |
| Salzgitter Flachstahl GmbH | 163 |
30 |
| Tata Steel Ijmuiden B.V. | 328 |
25 |
| ThyssenKrupp AG | 3399 |
20 |
| Voestalpine Stahl GmbH | 388 |
19 |
| Kobe Steel, Ltd. | 898 |
18 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
17 |
| Kanthal AB | 114 |
15 |
| Nisshin Steel Co., Ltd. | 382 |
14 |
| Nanjing Iron&Steel Co.,Ltd. | 186 |
11 |
| Daido Steel Co., Ltd. | 284 |
10 |
| Other owners | 525 |