- 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: 2149
10-year publication summary
|
183
|
187
|
186
|
226
|
160
|
139
|
168
|
221
|
208
|
161
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6476 |
300 |
| JFE Steel Corporation | 7044 |
288 |
| POSCO Co., Ltd. | 1593 |
237 |
| ArcelorMittal | 2384 |
207 |
| POSCO | 2176 |
131 |
| Baoshan Iron & Steel Co., Ltd. | 985 |
103 |
| Hyundai Steel Company | 451 |
64 |
| ThyssenKrupp Steel Europe AG | 962 |
62 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
39 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 165 |
32 |
| Salzgitter Flachstahl GmbH | 161 |
29 |
| Tata Steel Ijmuiden B.V. | 311 |
23 |
| ThyssenKrupp AG | 3336 |
23 |
| Kobe Steel, Ltd. | 884 |
19 |
| Voestalpine Stahl GmbH | 365 |
18 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
17 |
| Kanthal AB | 111 |
15 |
| Nisshin Steel Co., Ltd. | 394 |
14 |
| ArcelorMittal France | 89 |
11 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2871 |
11 |
| Other owners | 506 |