- 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
|
79
|
47
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7549 |
203 |
| Nippon Steel Corporation | 6895 |
162 |
| ArcelorMittal | 2680 |
89 |
| Baoshan Iron & Steel Co., Ltd. | 1104 |
79 |
| POSCO | 2142 |
79 |
| POSCO Co., Ltd. | 2015 |
71 |
| True Velocity IP Holdings, Inc. | 249 |
57 |
| ThyssenKrupp Steel Europe AG | 992 |
33 |
| NTN Corporation | 4915 |
27 |
| Hitachi Metals, Ltd. | 1896 |
23 |
| Aperam | 138 |
22 |
| Salzgitter Flachstahl GmbH | 163 |
20 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
16 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 156 |
15 |
| ThyssenKrupp AG | 3399 |
15 |
| NIPPON STEEL Stainless Steel Corporation | 277 |
14 |
| NHK Spring Co., Ltd. | 1983 |
13 |
| Aktiebolaget SKF | 3130 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 207 |
11 |
| MM Metals USA, LLC | 14 |
11 |
| Other owners | 798 |