- 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: 14792
10-year publication summary
|
1066
|
1102
|
1073
|
1124
|
977
|
1143
|
1145
|
1195
|
1203
|
38
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7123 |
2978 |
| Nippon Steel Corporation | 6549 |
2479 |
| POSCO Co., Ltd. | 1608 |
763 |
| Nippon Steel & Sumitomo Metal Corporation | 1986 |
714 |
| ArcelorMittal | 2428 |
519 |
| POSCO | 2155 |
515 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2862 |
411 |
| Hitachi Metals, Ltd. | 1951 |
305 |
| TDK Corporation | 6756 |
207 |
| Baoshan Iron & Steel Co., Ltd. | 1028 |
205 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
203 |
| Hyundai Steel Company | 458 |
159 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 164 |
136 |
| NTN Corporation | 4949 |
121 |
| Proterial, Ltd. | 890 |
112 |
| ThyssenKrupp Steel Europe AG | 964 |
110 |
| Daido Steel Co., Ltd. | 275 |
95 |
| Sumitomo Metal Industries, Ltd. | 359 |
91 |
| Nisshin Steel Co., Ltd. | 393 |
89 |
| SANYO Special Steel Co., Ltd. | 239 |
88 |
| Other owners | 4492 |