- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Patent holdings for IPC class C22C 38/54
Total number of patents in this class: 1922
10-year publication summary
181
|
196
|
203
|
185
|
215
|
178
|
171
|
222
|
176
|
30
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
379 |
JFE Steel Corporation | 6067 |
322 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
104 |
ArcelorMittal | 1887 |
100 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
65 |
NIPPON STEEL Stainless Steel Corporation | 254 |
57 |
POSCO Co., Ltd. | 1059 |
53 |
Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
47 |
POSCO | 2222 |
46 |
Baoshan Iron & Steel Co., Ltd. | 832 |
43 |
ThyssenKrupp Steel Europe AG | 924 |
23 |
Daido Steel Co., Ltd. | 237 |
19 |
Nisshin Steel Co., Ltd. | 401 |
19 |
Kobe Steel, Ltd. | 912 |
16 |
ThyssenKrupp AG | 3086 |
15 |
Nanjing Iron&Steel Co.,Ltd. | 135 |
15 |
Hitachi Metals, Ltd. | 2175 |
14 |
United States Steel Corporation | 168 |
14 |
Voestalpine Stahl GmbH | 311 |
14 |
Sumitomo Metal Industries, Ltd. | 453 |
13 |
Other owners | 544 |