- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
Patent holdings for IPC class C22C 38/20
Total number of patents in this class: 718
10-year publication summary
86
|
75
|
70
|
75
|
89
|
93
|
74
|
60
|
62
|
10
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
121 |
JFE Steel Corporation | 6067 |
119 |
POSCO Co., Ltd. | 1059 |
52 |
POSCO | 2222 |
41 |
ArcelorMittal | 1887 |
22 |
Baoshan Iron & Steel Co., Ltd. | 832 |
18 |
NIPPON STEEL Stainless Steel Corporation | 254 |
14 |
ThyssenKrupp Steel Europe AG | 924 |
12 |
Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
10 |
Salzgitter Flachstahl GmbH | 155 |
10 |
Daido Steel Co., Ltd. | 237 |
8 |
Höganäs AB | 337 |
8 |
Tata Steel Ijmuiden B.V. | 283 |
8 |
Seiko Epson Corporation | 18724 |
7 |
Kobe Steel, Ltd. | 912 |
7 |
Hyundai Steel Company | 310 |
6 |
Tata Steel Nederland Technology BV | 143 |
6 |
NTN Corporation | 5008 |
5 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
5 |
QuesTek Innovations LLC | 65 |
5 |
Other owners | 234 |