- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Patent holdings for IPC class C22C 38/38
Total number of patents in this class: 2315
10-year publication summary
|
180
|
199
|
191
|
205
|
181
|
142
|
168
|
195
|
203
|
125
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6916 |
381 |
| Nippon Steel Corporation | 6334 |
282 |
| ArcelorMittal | 2319 |
258 |
| POSCO Co., Ltd. | 1571 |
214 |
| POSCO | 2183 |
159 |
| Baoshan Iron & Steel Co., Ltd. | 966 |
79 |
| Hyundai Steel Company | 435 |
57 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
55 |
| ThyssenKrupp Steel Europe AG | 959 |
45 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2877 |
43 |
| Salzgitter Flachstahl GmbH | 159 |
39 |
| Tata Steel Ijmuiden B.V. | 311 |
31 |
| Voestalpine Stahl GmbH | 359 |
30 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 166 |
24 |
| Kobe Steel, Ltd. | 879 |
20 |
| ThyssenKrupp AG | 3308 |
17 |
| Nisshin Steel Co., Ltd. | 394 |
14 |
| GM Global Technology Operations LLC | 15150 |
11 |
| Tata Steel Nederland Technology BV | 151 |
11 |
| NIPPON STEEL Stainless Steel Corporation | 283 |
11 |
| Other owners | 534 |