- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/30 - Ferrous alloys, e.g. steel alloys containing chromium with cobalt
Patent holdings for IPC class C22C 38/30
Total number of patents in this class: 245
10-year publication summary
|
26
|
32
|
33
|
24
|
29
|
26
|
24
|
26
|
18
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5649 |
30 |
| JFE Steel Corporation | 6067 |
12 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
10 |
| Aktiebolaget SKF | 2700 |
8 |
| POSCO | 2222 |
8 |
| Hitachi Metals, Ltd. | 2175 |
7 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
7 |
| POSCO Co., Ltd. | 1059 |
7 |
| Daido Steel Co., Ltd. | 237 |
6 |
| Siemens AG | 24990 |
5 |
| Salzgitter Flachstahl GmbH | 155 |
5 |
| General Electric Company | 18133 |
4 |
| Advanced Technology & Materials Co., Ltd. | 31 |
4 |
| HeYe Special Steel Co. Ltd | 7 |
4 |
| HRL Laboratories, LLC | 1588 |
4 |
| Uddeholms Aktiebolag | 197 |
4 |
| Toshiba Corporation | 12017 |
3 |
| Aperam | 104 |
3 |
| ATI Properties LLC | 202 |
3 |
| Erasteel Kloster Aktiebolag | 7 |
3 |
| Other owners | 108 |