- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/00 - Ferrous alloys, e.g. steel alloys
Patent holdings for IPC class C22C 38/00
Total number of patents in this class: 15481
10-year publication summary
|
1098
|
1168
|
1129
|
1162
|
997
|
1174
|
1178
|
1198
|
1254
|
820
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7527 |
3118 |
| Nippon Steel Corporation | 6871 |
2630 |
| POSCO Co., Ltd. | 2012 |
919 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
714 |
| ArcelorMittal | 2672 |
588 |
| POSCO | 2143 |
518 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
394 |
| Hitachi Metals, Ltd. | 1898 |
299 |
| Baoshan Iron & Steel Co., Ltd. | 1102 |
220 |
| TDK Corporation | 6858 |
210 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
205 |
| Hyundai Steel Company | 531 |
194 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 157 |
129 |
| Proterial, Ltd. | 935 |
124 |
| NTN Corporation | 4914 |
121 |
| ThyssenKrupp Steel Europe AG | 990 |
112 |
| Daido Steel Co., Ltd. | 284 |
102 |
| SANYO Special Steel Co., Ltd. | 246 |
95 |
| Nisshin Steel Co., Ltd. | 382 |
89 |
| Sumitomo Metal Industries, Ltd. | 316 |
72 |
| Other owners | 4628 |