- All sections
- C - Chemistry; metallurgy
- 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: 3031
10-year publication summary
|
264
|
267
|
290
|
317
|
356
|
346
|
290
|
357
|
311
|
81
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5649 |
327 |
| JFE Steel Corporation | 6067 |
270 |
| POSCO | 2222 |
150 |
| ArcelorMittal | 1887 |
136 |
| POSCO Co., Ltd. | 1059 |
124 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
61 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
59 |
| True Velocity IP Holdings, LLC | 255 |
57 |
| Outokumpu Oyj | 250 |
40 |
| Daido Steel Co., Ltd. | 237 |
37 |
| Sandvik Intellectual Property AB | 1634 |
35 |
| Hitachi Metals, Ltd. | 2175 |
31 |
| ATI Properties LLC | 202 |
27 |
| NTN Corporation | 5008 |
26 |
| Aubert & Duval | 106 |
26 |
| Nanjing Iron&Steel Co.,Ltd. | 135 |
26 |
| Hyundai Motor Company | 19021 |
25 |
| ThyssenKrupp Steel Europe AG | 924 |
23 |
| Hyundai Steel Company | 310 |
21 |
| CRS Holdings, LLC | 156 |
20 |
| Other owners | 1510 |