- All sections
- C - Chemistry; metallurgy
- 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: 12946
10-year publication summary
|
998
|
1067
|
1098
|
1166
|
1124
|
1161
|
993
|
1177
|
1147
|
346
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
2612 |
| Nippon Steel Corporation | 5649 |
2003 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
714 |
| POSCO | 2222 |
529 |
| POSCO Co., Ltd. | 1059 |
493 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
408 |
| ArcelorMittal | 1887 |
370 |
| Hitachi Metals, Ltd. | 2175 |
314 |
| TDK Corporation | 6306 |
199 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
168 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
164 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
140 |
| Sumitomo Metal Industries, Ltd. | 453 |
130 |
| NTN Corporation | 5008 |
120 |
| ThyssenKrupp Steel Europe AG | 924 |
98 |
| Nisshin Steel Co., Ltd. | 401 |
90 |
| Hyundai Steel Company | 310 |
83 |
| Daido Steel Co., Ltd. | 237 |
77 |
| Proterial, Ltd. | 638 |
76 |
| SANYO Special Steel Co., Ltd. | 201 |
75 |
| Other owners | 4083 |