- All sections
- C - Chemistry; metallurgy
- C23C - Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
- C23C 2/28 - Thermal after-treatment, e.g. treatment in oil bath
Patent holdings for IPC class C23C 2/28
Total number of patents in this class: 1303
10-year publication summary
90
|
123
|
114
|
120
|
121
|
109
|
102
|
108
|
78
|
41
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
347 |
Nippon Steel Corporation | 5649 |
250 |
ArcelorMittal | 1887 |
139 |
POSCO Co., Ltd. | 1059 |
104 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
75 |
POSCO | 2222 |
59 |
ThyssenKrupp Steel Europe AG | 924 |
41 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
26 |
BlueScope Steel Limited | 223 |
17 |
Voestalpine Stahl GmbH | 311 |
16 |
ArcelorMittal France | 102 |
13 |
Tata Steel Ijmuiden B.V. | 283 |
13 |
Hyundai Steel Company | 310 |
12 |
Kobe Steel, Ltd. | 912 |
12 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
10 |
Salzgitter Flachstahl GmbH | 155 |
9 |
ThyssenKrupp AG | 3086 |
9 |
JFE Galvanizing & Coating Co., Ltd. | 31 |
8 |
ThyssenKrupp Rasselstein GmbH | 72 |
8 |
Nisshin Steel Co., Ltd. | 401 |
7 |
Other owners | 128 |