- 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: 869
10-year publication summary
|
68
|
71
|
87
|
91
|
73
|
63
|
70
|
66
|
66
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6651 |
151 |
| JFE Steel Corporation | 7235 |
132 |
| POSCO Co., Ltd. | 1641 |
62 |
| ArcelorMittal | 2490 |
61 |
| POSCO | 2154 |
41 |
| Baoshan Iron & Steel Co., Ltd. | 1059 |
34 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
14 |
| Hyundai Steel Company | 476 |
13 |
| ThyssenKrupp Steel Europe AG | 976 |
13 |
| Salzgitter Flachstahl GmbH | 161 |
12 |
| Seiko Epson Corporation | 19881 |
10 |
| Daido Steel Co., Ltd. | 277 |
10 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 163 |
10 |
| Höganäs AB | 302 |
8 |
| Tata Steel Ijmuiden B.V. | 317 |
8 |
| Tata Steel Nederland Technology BV | 154 |
6 |
| Jiangsu Shagang Group Co., Ltd. | 105 |
6 |
| NTN Corporation | 4936 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2851 |
5 |
| QuesTek Innovations LLC | 61 |
5 |
| Other owners | 263 |