- 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: 14580
10-year publication summary
|
1048
|
1066
|
1102
|
1073
|
1124
|
977
|
1143
|
1145
|
1194
|
1011
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6992 |
2930 |
| Nippon Steel Corporation | 6405 |
2411 |
| POSCO Co., Ltd. | 1576 |
756 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
714 |
| POSCO | 2178 |
521 |
| ArcelorMittal | 2344 |
496 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2881 |
412 |
| Hitachi Metals, Ltd. | 1969 |
307 |
| TDK Corporation | 6878 |
206 |
| NIPPON STEEL Stainless Steel Corporation | 282 |
202 |
| Baoshan Iron & Steel Co., Ltd. | 969 |
194 |
| Hyundai Steel Company | 446 |
152 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 166 |
137 |
| NTN Corporation | 4979 |
121 |
| ThyssenKrupp Steel Europe AG | 961 |
110 |
| Proterial, Ltd. | 872 |
107 |
| Daido Steel Co., Ltd. | 272 |
93 |
| Sumitomo Metal Industries, Ltd. | 365 |
92 |
| Nisshin Steel Co., Ltd. | 394 |
89 |
| SANYO Special Steel Co., Ltd. | 227 |
87 |
| Other owners | 4443 |