- All sections
- C - Chemistrymetallurgy
- C23C - Coating metallic materialcoating material with metallic materialsurface treatment of metallic material by diffusion into the surface, by chemical conversion or substitutioncoating 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: 1706
10-year publication summary
|
114
|
120
|
124
|
111
|
109
|
139
|
114
|
143
|
115
|
146
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7704 |
452 |
| Nippon Steel Corporation | 7118 |
307 |
| POSCO Co., Ltd. | 2039 |
193 |
| ArcelorMittal | 2766 |
183 |
| Nippon Steel & Sumitomo Metal Corporation | 1980 |
75 |
| POSCO | 2139 |
70 |
| ThyssenKrupp Steel Europe AG | 999 |
54 |
| Hyundai Steel Company | 558 |
38 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2842 |
27 |
| Voestalpine Stahl GmbH | 394 |
21 |
| Baoshan Iron & Steel Co., Ltd. | 1141 |
19 |
| Tata Steel Ijmuiden B.V. | 332 |
17 |
| BlueScope Steel Limited | 203 |
16 |
| Kobe Steel, Ltd. | 903 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 208 |
10 |
| Salzgitter Flachstahl GmbH | 164 |
10 |
| JFE Galvanizing & Coating Co., Ltd. | 33 |
9 |
| Nucor Corporation | 418 |
9 |
| ArcelorMittal France | 67 |
8 |
| ThyssenKrupp Rasselstein GmbH | 70 |
8 |
| Other owners | 168 |