- 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: 15151
10-year publication summary
|
1098
|
1168
|
1129
|
1162
|
997
|
1175
|
1176
|
1197
|
1247
|
467
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7407 |
3082 |
| Nippon Steel Corporation | 6751 |
2554 |
| POSCO Co., Ltd. | 1687 |
798 |
| Nippon Steel & Sumitomo Metal Corporation | 1982 |
714 |
| ArcelorMittal | 2572 |
547 |
| POSCO | 2153 |
518 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2833 |
400 |
| Hitachi Metals, Ltd. | 1916 |
299 |
| Baoshan Iron & Steel Co., Ltd. | 1091 |
215 |
| TDK Corporation | 6821 |
210 |
| NIPPON STEEL Stainless Steel Corporation | 278 |
206 |
| Hyundai Steel Company | 508 |
186 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 161 |
133 |
| NTN Corporation | 4928 |
121 |
| Proterial, Ltd. | 928 |
120 |
| ThyssenKrupp Steel Europe AG | 987 |
113 |
| Daido Steel Co., Ltd. | 281 |
100 |
| SANYO Special Steel Co., Ltd. | 244 |
93 |
| Nisshin Steel Co., Ltd. | 389 |
89 |
| Sumitomo Metal Industries, Ltd. | 322 |
75 |
| Other owners | 4578 |