- 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: 2561
10-year publication summary
|
213
|
215
|
222
|
189
|
154
|
185
|
213
|
218
|
170
|
210
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7660 |
418 |
| Nippon Steel Corporation | 7050 |
314 |
| ArcelorMittal | 2749 |
299 |
| POSCO Co., Ltd. | 2031 |
299 |
| POSCO | 2143 |
164 |
| Baoshan Iron & Steel Co., Ltd. | 1134 |
100 |
| Hyundai Steel Company | 549 |
66 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
55 |
| ThyssenKrupp Steel Europe AG | 996 |
48 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2844 |
44 |
| Salzgitter Flachstahl GmbH | 163 |
42 |
| Voestalpine Stahl GmbH | 394 |
32 |
| Tata Steel Ijmuiden B.V. | 328 |
31 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 155 |
24 |
| Kobe Steel, Ltd. | 899 |
21 |
| ThyssenKrupp AG | 3328 |
17 |
| Nisshin Steel Co., Ltd. | 382 |
14 |
| GM Global Technology Operations LLC | 16237 |
13 |
| Tata Steel Nederland Technology BV | 163 |
12 |
| Nanjing Iron&Steel Co.,Ltd. | 188 |
12 |
| Other owners | 536 |