- 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: 1695
10-year publication summary
|
134
|
185
|
176
|
169
|
150
|
114
|
97
|
73
|
87
|
30
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6720 |
196 |
| Nippon Steel Corporation | 6136 |
154 |
| POSCO | 2188 |
80 |
| ArcelorMittal | 2187 |
79 |
| Baoshan Iron & Steel Co., Ltd. | 949 |
61 |
| POSCO Co., Ltd. | 1378 |
59 |
| True Velocity IP Holdings, Inc. | 245 |
57 |
| ThyssenKrupp Steel Europe AG | 952 |
33 |
| NTN Corporation | 4979 |
25 |
| Hitachi Metals, Ltd. | 1990 |
23 |
| Aperam | 117 |
20 |
| Salzgitter Flachstahl GmbH | 157 |
20 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 168 |
17 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
16 |
| ThyssenKrupp AG | 3248 |
16 |
| NIPPON STEEL Stainless Steel Corporation | 288 |
14 |
| NHK Spring Co., Ltd. | 1812 |
13 |
| Aktiebolaget SKF | 2916 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
11 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2863 |
11 |
| Other owners | 778 |