- 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: 737
10-year publication summary
|
62
|
66
|
65
|
95
|
77
|
84
|
65
|
69
|
58
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5991 |
92 |
| JFE Steel Corporation | 6538 |
80 |
| NIPPON STEEL Stainless Steel Corporation | 281 |
26 |
| Hitachi Metals, Ltd. | 2026 |
18 |
| ATI Properties LLC | 203 |
18 |
| Aubert & Duval | 106 |
18 |
| Daido Steel Co., Ltd. | 258 |
16 |
| CRS Holdings, LLC | 157 |
14 |
| Aperam | 114 |
13 |
| QuesTek Innovations LLC | 65 |
11 |
| L.E. Jones Company, LLC | 16 |
10 |
| POSCO Co., Ltd. | 1293 |
10 |
| Uddeholms Aktiebolag | 196 |
9 |
| POSCO | 2204 |
8 |
| ArcelorMittal | 2052 |
7 |
| CRS Holdings, Inc. | 34 |
7 |
| GE Infrastructure Technology, LLC | 6109 |
7 |
| Hyundai Motor Company | 20403 |
6 |
| Aktiebolaget SKF | 2834 |
6 |
| Vacuumschmelze GmbH & Co. KG | 261 |
6 |
| Other owners | 355 |