- 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 22/46 - 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 oxalates
Patent holdings for IPC class C23C 22/46
Total number of patents in this class: 57
10-year publication summary
8
|
5
|
5
|
3
|
4
|
5
|
6
|
3
|
2
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Chemetall GmbH | 382 |
10 |
POSCO | 2222 |
6 |
Nippon Steel Corporation | 5649 |
4 |
Ewald Dorken AG | 266 |
3 |
Henkel AG & Co. KGaA | 10129 |
2 |
Atotech Deutschland GmbH | 586 |
2 |
DIPSOL Chemicals Co., Ltd. | 57 |
2 |
Hyundai Steel Company | 310 |
2 |
Nippon Hyomen Kagaku Kabushiki Kaisha | 5 |
2 |
Sumitomo Metal Industries, Ltd. | 453 |
2 |
Yuken Industry Co., Ltd. | 60 |
2 |
Hitachi, Ltd. | 16452 |
1 |
AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
1 |
Astra Tech AB | 55 |
1 |
Goertek Inc. | 2477 |
1 |
Helmholtz-Zentrum Geesthacht Zentrum für Material-und Küstenforschung GmbH | 67 |
1 |
MAHLE International GmbH | 2670 |
1 |
Morimura Bros., Inc. | 2 |
1 |
Murata Co., Ltd. | 2 |
1 |
Nihon Hyomen Kagaku Kabushiki Kaisha | 1 |
1 |
Other owners | 11 |