- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
Patent holdings for IPC class C22C 38/34
Total number of patents in this class: 1046
10-year publication summary
|
91
|
84
|
86
|
83
|
67
|
58
|
61
|
95
|
113
|
86
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6452 |
148 |
| JFE Steel Corporation | 7012 |
118 |
| POSCO Co., Ltd. | 1586 |
98 |
| ArcelorMittal | 2360 |
91 |
| POSCO | 2177 |
59 |
| Baoshan Iron & Steel Co., Ltd. | 975 |
21 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2880 |
20 |
| NHK Spring Co., Ltd. | 1912 |
18 |
| NIPPON STEEL Stainless Steel Corporation | 280 |
16 |
| Höganäs AB | 310 |
14 |
| Hitachi Metals, Ltd. | 1965 |
11 |
| ThyssenKrupp Steel Europe AG | 962 |
11 |
| Hyundai Steel Company | 451 |
10 |
| United States Steel Corporation | 173 |
10 |
| Seiko Epson Corporation | 19675 |
9 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
9 |
| Salzgitter Flachstahl GmbH | 161 |
9 |
| Taiyo Yuden Co., Ltd. | 1977 |
9 |
| Nippon Steel SG Wire Co., Ltd. | 14 |
8 |
| GM Global Technology Operations LLC | 15281 |
7 |
| Other owners | 350 |