- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
Patent holdings for IPC class C22C 38/18
Total number of patents in this class: 1770
10-year publication summary
|
185
|
176
|
170
|
150
|
115
|
98
|
78
|
93
|
83
|
49
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7599 |
204 |
| Nippon Steel Corporation | 6945 |
163 |
| ArcelorMittal | 2720 |
90 |
| Baoshan Iron & Steel Co., Ltd. | 1115 |
81 |
| POSCO | 2142 |
79 |
| POSCO Co., Ltd. | 2025 |
71 |
| True Velocity IP Holdings, Inc. | 251 |
57 |
| ThyssenKrupp Steel Europe AG | 995 |
33 |
| NTN Corporation | 4922 |
27 |
| Hitachi Metals, Ltd. | 1824 |
23 |
| Aperam | 143 |
23 |
| Salzgitter Flachstahl GmbH | 163 |
20 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
16 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 155 |
15 |
| ThyssenKrupp AG | 3354 |
15 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
14 |
| NHK Spring Co., Ltd. | 1994 |
13 |
| Aktiebolaget SKF | 3148 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 208 |
11 |
| MM Metals USA, LLC | 14 |
11 |
| Other owners | 792 |