- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Patent holdings for IPC class C22C 38/44
Total number of patents in this class: 3249
10-year publication summary
|
267
|
290
|
317
|
356
|
346
|
293
|
361
|
323
|
256
|
89
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6139 |
361 |
| JFE Steel Corporation | 6730 |
286 |
| ArcelorMittal | 2197 |
151 |
| POSCO Co., Ltd. | 1381 |
151 |
| POSCO | 2188 |
150 |
| Baoshan Iron & Steel Co., Ltd. | 950 |
74 |
| NIPPON STEEL Stainless Steel Corporation | 290 |
66 |
| True Velocity IP Holdings, Inc. | 245 |
57 |
| Daido Steel Co., Ltd. | 262 |
45 |
| Outokumpu Oyj | 257 |
39 |
| Nanjing Iron&Steel Co.,Ltd. | 161 |
31 |
| Hitachi Metals, Ltd. | 1990 |
30 |
| Sandvik Intellectual Property AB | 1500 |
30 |
| Hyundai Steel Company | 389 |
28 |
| NTN Corporation | 4975 |
27 |
| ATI Properties LLC | 204 |
27 |
| ThyssenKrupp Steel Europe AG | 950 |
27 |
| Hyundai Motor Company | 21451 |
25 |
| Aubert & Duval | 111 |
24 |
| CRS Holdings, LLC | 154 |
22 |
| Other owners | 1598 |