- 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: 2212
10-year publication summary
|
187
|
186
|
226
|
160
|
139
|
170
|
221
|
209
|
173
|
41
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6687 |
308 |
| JFE Steel Corporation | 7339 |
300 |
| POSCO Co., Ltd. | 1656 |
247 |
| ArcelorMittal | 2525 |
220 |
| POSCO | 2155 |
132 |
| Baoshan Iron & Steel Co., Ltd. | 1072 |
113 |
| ThyssenKrupp Steel Europe AG | 984 |
65 |
| Hyundai Steel Company | 488 |
64 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
39 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 163 |
32 |
| Salzgitter Flachstahl GmbH | 161 |
29 |
| Tata Steel Ijmuiden B.V. | 319 |
23 |
| ThyssenKrupp AG | 3463 |
23 |
| Kobe Steel, Ltd. | 893 |
19 |
| Voestalpine Stahl GmbH | 381 |
19 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
17 |
| Kanthal AB | 115 |
15 |
| Nisshin Steel Co., Ltd. | 390 |
14 |
| Nanjing Iron&Steel Co.,Ltd. | 181 |
11 |
| Daido Steel Co., Ltd. | 280 |
10 |
| Other owners | 512 |