- 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: 2084
10-year publication summary
|
199
|
198
|
209
|
200
|
213
|
186
|
169
|
189
|
230
|
139
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5824 |
238 |
| JFE Steel Corporation | 6308 |
209 |
| ArcelorMittal | 1986 |
150 |
| POSCO Co., Ltd. | 1241 |
144 |
| POSCO | 2211 |
100 |
| Baoshan Iron & Steel Co., Ltd. | 858 |
74 |
| ThyssenKrupp Steel Europe AG | 936 |
38 |
| Hyundai Steel Company | 337 |
33 |
| Hitachi Metals, Ltd. | 2122 |
32 |
| Salzgitter Flachstahl GmbH | 158 |
26 |
| NTN Corporation | 4983 |
23 |
| NIPPON STEEL Stainless Steel Corporation | 271 |
23 |
| Tata Steel Ijmuiden B.V. | 293 |
21 |
| Aktiebolaget SKF | 2760 |
20 |
| ThyssenKrupp AG | 3147 |
17 |
| Kobe Steel, Ltd. | 856 |
15 |
| Oerlikon Metco (US) Inc. | 206 |
12 |
| Uddeholms Aktiebolag | 193 |
11 |
| Nanjing Iron&Steel Co.,Ltd. | 144 |
11 |
| Honda Motor Co., Ltd. | 24429 |
10 |
| Other owners | 877 |