- 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 22/38 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds containing also phosphates
Patent holdings for IPC class C23C 22/38
Total number of patents in this class: 5
10-year publication summary
1
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2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nihon Parkerizing Co., Ltd. | 274 |
2 |
Henkel AG & Co. KGaA | 10129 |
1 |
JFE Steel Corporation | 6067 |
1 |
Shenzhen Hengzhaozhi Technology Co., Ltd. | 64 |
1 |
Other owners | 0 |