- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/34 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
Patent holdings for IPC class C22C 38/34
Total number of patents in this class: 873
10-year publication summary
104
|
92
|
85
|
93
|
88
|
68
|
59
|
61
|
95
|
35
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
124 |
JFE Steel Corporation | 6067 |
104 |
POSCO | 2222 |
60 |
ArcelorMittal | 1887 |
55 |
POSCO Co., Ltd. | 1059 |
51 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
20 |
Baoshan Iron & Steel Co., Ltd. | 832 |
16 |
NHK Spring Co., Ltd. | 1657 |
16 |
NIPPON STEEL Stainless Steel Corporation | 254 |
14 |
Hitachi Metals, Ltd. | 2175 |
11 |
Höganäs AB | 337 |
11 |
United States Steel Corporation | 168 |
11 |
ThyssenKrupp Steel Europe AG | 924 |
10 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
9 |
Salzgitter Flachstahl GmbH | 155 |
9 |
Taiyo Yuden Co., Ltd. | 1809 |
9 |
Nippon Steel SG Wire Co., Ltd. | 13 |
8 |
JPMorgan Chase Bank, National Association | 10964 |
7 |
Federal-Mogul Burscheid GmbH | 284 |
7 |
Kobe Steel, Ltd. | 912 |
7 |
Other owners | 314 |