- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
Patent holdings for IPC class C22C 38/20
Total number of patents in this class: 898
10-year publication summary
|
70
|
75
|
90
|
95
|
74
|
64
|
72
|
69
|
83
|
36
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6754 |
155 |
| JFE Steel Corporation | 7418 |
137 |
| ArcelorMittal | 2608 |
69 |
| POSCO Co., Ltd. | 1703 |
62 |
| POSCO | 2152 |
41 |
| Baoshan Iron & Steel Co., Ltd. | 1092 |
36 |
| Hyundai Steel Company | 509 |
14 |
| NIPPON STEEL Stainless Steel Corporation | 278 |
14 |
| Salzgitter Flachstahl GmbH | 163 |
13 |
| ThyssenKrupp Steel Europe AG | 988 |
13 |
| Seiko Epson Corporation | 20099 |
11 |
| Daido Steel Co., Ltd. | 281 |
10 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 161 |
10 |
| Tata Steel Ijmuiden B.V. | 321 |
8 |
| Höganäs AB | 302 |
7 |
| Bengang Steel Plates Co., Ltd. | 38 |
7 |
| Tata Steel Nederland Technology BV | 158 |
6 |
| Jiangsu Shagang Group Co., Ltd. | 109 |
6 |
| NTN Corporation | 4924 |
5 |
| Kobe Steel, Ltd. | 896 |
5 |
| Other owners | 269 |