- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
Patent holdings for IPC class C22C 38/22
Total number of patents in this class: 2026
10-year publication summary
|
199
|
198
|
209
|
200
|
213
|
186
|
168
|
188
|
222
|
59
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5649 |
233 |
| JFE Steel Corporation | 6067 |
207 |
| ArcelorMittal | 1887 |
143 |
| POSCO Co., Ltd. | 1059 |
121 |
| POSCO | 2222 |
100 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
69 |
| ThyssenKrupp Steel Europe AG | 924 |
37 |
| Hitachi Metals, Ltd. | 2175 |
33 |
| Hyundai Steel Company | 310 |
30 |
| Salzgitter Flachstahl GmbH | 155 |
24 |
| NTN Corporation | 5008 |
23 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
22 |
| Tata Steel Ijmuiden B.V. | 283 |
21 |
| Aktiebolaget SKF | 2700 |
20 |
| Kobe Steel, Ltd. | 912 |
17 |
| ThyssenKrupp AG | 3086 |
17 |
| Oerlikon Metco (US) Inc. | 202 |
12 |
| Uddeholms Aktiebolag | 197 |
11 |
| Nanjing Iron&Steel Co.,Ltd. | 135 |
11 |
| Honda Motor Co., Ltd. | 24537 |
10 |
| Other owners | 865 |