- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
Patent holdings for IPC class C22C 38/52
Total number of patents in this class: 699
10-year publication summary
|
63
|
62
|
66
|
65
|
94
|
77
|
82
|
65
|
67
|
14
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
78 |
| Nippon Steel Corporation | 5649 |
76 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
25 |
| Hitachi Metals, Ltd. | 2175 |
18 |
| ATI Properties LLC | 202 |
18 |
| Aubert & Duval | 106 |
18 |
| Daido Steel Co., Ltd. | 237 |
16 |
| Aperam | 104 |
13 |
| CRS Holdings, LLC | 156 |
12 |
| QuesTek Innovations LLC | 65 |
11 |
| L.E. Jones Company, LLC | 16 |
10 |
| Uddeholms Aktiebolag | 197 |
9 |
| POSCO | 2222 |
8 |
| ArcelorMittal | 1887 |
7 |
| CRS Holdings, Inc. | 36 |
7 |
| Hyundai Motor Company | 19021 |
6 |
| Aktiebolaget SKF | 2700 |
6 |
| POSCO Co., Ltd. | 1059 |
6 |
| ThyssenKrupp Steel Europe AG | 924 |
6 |
| VDM Metals International GmbH | 97 |
6 |
| Other owners | 343 |