- All sections
- C - Chemistry; metallurgy
- 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: 1611
10-year publication summary
164
|
134
|
185
|
175
|
168
|
149
|
113
|
94
|
64
|
22
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
192 |
Nippon Steel Corporation | 5649 |
155 |
POSCO | 2222 |
80 |
ArcelorMittal | 1887 |
72 |
True Velocity IP Holdings, LLC | 255 |
57 |
POSCO Co., Ltd. | 1059 |
48 |
Baoshan Iron & Steel Co., Ltd. | 832 |
41 |
ThyssenKrupp Steel Europe AG | 924 |
31 |
Hitachi Metals, Ltd. | 2175 |
23 |
NTN Corporation | 5008 |
23 |
Aperam | 104 |
20 |
Salzgitter Flachstahl GmbH | 155 |
19 |
Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
17 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
16 |
ThyssenKrupp AG | 3086 |
15 |
NIPPON STEEL Stainless Steel Corporation | 254 |
14 |
NHK Spring Co., Ltd. | 1657 |
13 |
Aktiebolaget SKF | 2700 |
12 |
Kobe Steel, Ltd. | 912 |
12 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
11 |
Other owners | 740 |