- All sections
- C - Chemistry; metallurgy
- C22C - Alloys
- C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
Patent holdings for IPC class C22C 38/16
Total number of patents in this class: 1595
10-year publication summary
|
163
|
168
|
194
|
176
|
176
|
178
|
139
|
132
|
122
|
43
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
337 |
| Nippon Steel Corporation | 5649 |
301 |
| TDK Corporation | 6306 |
68 |
| POSCO | 2222 |
61 |
| POSCO Co., Ltd. | 1059 |
54 |
| ArcelorMittal | 1887 |
46 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
44 |
| Proterial, Ltd. | 638 |
22 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
21 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 39 |
20 |
| Kobe Steel, Ltd. | 912 |
16 |
| United States Steel Corporation | 168 |
16 |
| Shin-Etsu Chemical Co., Ltd. | 5132 |
15 |
| NTN Corporation | 5008 |
13 |
| ThyssenKrupp Steel Europe AG | 924 |
13 |
| Fujian Changting Golden Dragon Rare-earth Co., Ltd. | 81 |
12 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
11 |
| Yantai Dongxing Magnetic Materials Inc. | 29 |
11 |
| Aperam | 104 |
10 |
| Salzgitter Flachstahl GmbH | 155 |
10 |
| Other owners | 494 |