- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
Patent holdings for IPC class C22C 38/12
Total number of patents in this class: 2499
10-year publication summary
234
|
245
|
271
|
264
|
286
|
251
|
213
|
224
|
213
|
74
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
472 |
Nippon Steel Corporation | 5649 |
348 |
ArcelorMittal | 1887 |
230 |
POSCO | 2222 |
127 |
POSCO Co., Ltd. | 1059 |
120 |
Baoshan Iron & Steel Co., Ltd. | 832 |
116 |
ThyssenKrupp Steel Europe AG | 924 |
53 |
Tata Steel Ijmuiden B.V. | 283 |
35 |
TDK Corporation | 6306 |
28 |
Kobe Steel, Ltd. | 912 |
23 |
Salzgitter Flachstahl GmbH | 155 |
22 |
ThyssenKrupp AG | 3086 |
22 |
Vacuumschmelze GmbH & Co. KG | 253 |
22 |
Nucor Corporation | 425 |
21 |
Voestalpine Stahl GmbH | 311 |
21 |
Nanjing Iron&Steel Co.,Ltd. | 135 |
18 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
15 |
Hyundai Steel Company | 310 |
15 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
14 |
Aperam | 104 |
13 |
Other owners | 764 |