- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Patent holdings for IPC class C22C 38/58
Total number of patents in this class: 3786
10-year publication summary
|
284
|
275
|
283
|
281
|
249
|
241
|
238
|
242
|
243
|
229
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7012 |
719 |
| Nippon Steel Corporation | 6465 |
630 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
293 |
| POSCO Co., Ltd. | 1589 |
187 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2873 |
164 |
| POSCO | 2176 |
153 |
| ArcelorMittal | 2369 |
126 |
| NIPPON STEEL Stainless Steel Corporation | 279 |
91 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 165 |
62 |
| True Velocity IP Holdings, Inc. | 246 |
57 |
| Baoshan Iron & Steel Co., Ltd. | 977 |
55 |
| Sumitomo Metal Industries, Ltd. | 363 |
55 |
| Nisshin Steel Co., Ltd. | 394 |
40 |
| Outokumpu Oyj | 261 |
39 |
| Hyundai Steel Company | 451 |
26 |
| ATI Properties LLC | 202 |
22 |
| Nanjing Iron&Steel Co.,Ltd. | 168 |
22 |
| Hitachi Metals, Ltd. | 1963 |
21 |
| Daido Steel Co., Ltd. | 273 |
19 |
| Salzgitter Flachstahl GmbH | 161 |
19 |
| Other owners | 986 |