- 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: 2334
10-year publication summary
|
180
|
199
|
191
|
205
|
181
|
142
|
168
|
195
|
203
|
141
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7012 |
383 |
| Nippon Steel Corporation | 6465 |
281 |
| ArcelorMittal | 2369 |
265 |
| POSCO Co., Ltd. | 1589 |
219 |
| POSCO | 2176 |
159 |
| Baoshan Iron & Steel Co., Ltd. | 977 |
79 |
| Hyundai Steel Company | 451 |
58 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
55 |
| ThyssenKrupp Steel Europe AG | 961 |
45 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2873 |
44 |
| Salzgitter Flachstahl GmbH | 161 |
41 |
| Tata Steel Ijmuiden B.V. | 311 |
31 |
| Voestalpine Stahl GmbH | 364 |
30 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 165 |
24 |
| Kobe Steel, Ltd. | 882 |
20 |
| ThyssenKrupp AG | 3328 |
17 |
| Nisshin Steel Co., Ltd. | 394 |
14 |
| GM Global Technology Operations LLC | 15310 |
13 |
| Tata Steel Nederland Technology BV | 152 |
11 |
| NIPPON STEEL Stainless Steel Corporation | 279 |
11 |
| Other owners | 534 |