- 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: 14350
10-year publication summary
|
1067
|
1098
|
1167
|
1128
|
1161
|
997
|
1181
|
1175
|
1195
|
771
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6833 |
2869 |
| Nippon Steel Corporation | 6231 |
2334 |
| POSCO Co., Ltd. | 1564 |
746 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
714 |
| POSCO | 2187 |
522 |
| ArcelorMittal | 2280 |
484 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2875 |
413 |
| Hitachi Metals, Ltd. | 1982 |
308 |
| TDK Corporation | 6720 |
204 |
| NIPPON STEEL Stainless Steel Corporation | 287 |
201 |
| Baoshan Iron & Steel Co., Ltd. | 962 |
193 |
| Hyundai Steel Company | 426 |
145 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 168 |
138 |
| NTN Corporation | 4978 |
121 |
| ThyssenKrupp Steel Europe AG | 954 |
109 |
| Proterial, Ltd. | 843 |
101 |
| Sumitomo Metal Industries, Ltd. | 383 |
99 |
| Daido Steel Co., Ltd. | 270 |
92 |
| Nisshin Steel Co., Ltd. | 394 |
89 |
| SANYO Special Steel Co., Ltd. | 222 |
86 |
| Other owners | 4382 |