- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Patent holdings for IPC class C22C 38/38
Total number of patents in this class: 2492
10-year publication summary
|
213
|
215
|
222
|
189
|
154
|
185
|
213
|
217
|
168
|
143
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7483 |
405 |
| Nippon Steel Corporation | 6839 |
297 |
| POSCO Co., Ltd. | 1997 |
295 |
| ArcelorMittal | 2656 |
282 |
| POSCO | 2147 |
162 |
| Baoshan Iron & Steel Co., Ltd. | 1098 |
94 |
| Hyundai Steel Company | 528 |
64 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
55 |
| ThyssenKrupp Steel Europe AG | 989 |
48 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2830 |
42 |
| Salzgitter Flachstahl GmbH | 163 |
42 |
| Voestalpine Stahl GmbH | 385 |
32 |
| Tata Steel Ijmuiden B.V. | 324 |
31 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 157 |
24 |
| Kobe Steel, Ltd. | 899 |
21 |
| ThyssenKrupp AG | 3438 |
17 |
| Nisshin Steel Co., Ltd. | 382 |
14 |
| GM Global Technology Operations LLC | 16087 |
13 |
| Tata Steel Nederland Technology BV | 161 |
12 |
| Nanjing Iron&Steel Co.,Ltd. | 186 |
12 |
| Other owners | 530 |