- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Patent holdings for IPC class C22C 38/50
Total number of patents in this class: 2096
10-year publication summary
|
204
|
203
|
226
|
239
|
228
|
231
|
215
|
250
|
210
|
47
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
317 |
| Nippon Steel Corporation | 5649 |
312 |
| ArcelorMittal | 1887 |
135 |
| POSCO Co., Ltd. | 1059 |
115 |
| POSCO | 2222 |
93 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
59 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
57 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
35 |
| Nanjing Iron&Steel Co.,Ltd. | 135 |
30 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
25 |
| Daido Steel Co., Ltd. | 237 |
23 |
| ThyssenKrupp Steel Europe AG | 924 |
21 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
20 |
| Hitachi Metals, Ltd. | 2175 |
18 |
| Kobe Steel, Ltd. | 912 |
18 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 58 |
16 |
| Outokumpu Oyj | 250 |
15 |
| Voestalpine Stahl GmbH | 311 |
14 |
| Jiangsu Shagang Group Co., Ltd. | 52 |
14 |
| Salzgitter Flachstahl GmbH | 155 |
13 |
| Other owners | 746 |