- 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: 1472
10-year publication summary
|
123
|
114
|
120
|
122
|
110
|
107
|
127
|
99
|
136
|
44
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6767 |
393 |
| Nippon Steel Corporation | 6166 |
274 |
| ArcelorMittal | 2227 |
146 |
| POSCO Co., Ltd. | 1395 |
142 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
75 |
| POSCO | 2189 |
62 |
| ThyssenKrupp Steel Europe AG | 950 |
51 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2872 |
27 |
| Hyundai Steel Company | 396 |
21 |
| BlueScope Steel Limited | 213 |
18 |
| Voestalpine Stahl GmbH | 353 |
15 |
| Tata Steel Ijmuiden B.V. | 304 |
14 |
| Baoshan Iron & Steel Co., Ltd. | 955 |
13 |
| ArcelorMittal France | 86 |
11 |
| Kobe Steel, Ltd. | 870 |
11 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
10 |
| Salzgitter Flachstahl GmbH | 158 |
10 |
| JFE Galvanizing & Coating Co., Ltd. | 32 |
9 |
| Nucor Corporation | 414 |
9 |
| ThyssenKrupp AG | 3266 |
9 |
| Other owners | 152 |