- 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: 3335
10-year publication summary
|
267
|
290
|
317
|
356
|
346
|
293
|
361
|
325
|
260
|
173
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6231 |
368 |
| JFE Steel Corporation | 6833 |
288 |
| POSCO Co., Ltd. | 1564 |
180 |
| ArcelorMittal | 2280 |
158 |
| POSCO | 2187 |
150 |
| Baoshan Iron & Steel Co., Ltd. | 962 |
77 |
| NIPPON STEEL Stainless Steel Corporation | 287 |
67 |
| True Velocity IP Holdings, Inc. | 247 |
57 |
| Daido Steel Co., Ltd. | 270 |
47 |
| Outokumpu Oyj | 260 |
39 |
| Hyundai Steel Company | 426 |
35 |
| Nanjing Iron&Steel Co.,Ltd. | 163 |
32 |
| Hitachi Metals, Ltd. | 1982 |
30 |
| Sandvik Intellectual Property AB | 1484 |
29 |
| NTN Corporation | 4978 |
27 |
| ATI Properties LLC | 205 |
27 |
| ThyssenKrupp Steel Europe AG | 954 |
27 |
| Hyundai Motor Company | 21960 |
25 |
| Aubert & Duval | 111 |
23 |
| CRS Holdings, LLC | 155 |
23 |
| Other owners | 1626 |