- 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 22/33 - 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 hexavalent chromium compounds containing also phosphates
Patent holdings for IPC class C23C 22/33
Total number of patents in this class: 34
10-year publication summary
3
|
4
|
3
|
6
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4
|
2
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0
|
1
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2
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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
|
---|---|---|
JFE Steel Corporation | 6067 |
13 |
Bulk Chemicals, Inc. | 42 |
2 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
2 |
Nippon Steel & Sumikin Hardfacing Co., Ltd. | 22 |
2 |
POSCO Co., Ltd. | 1059 |
2 |
Henkel AG & Co. KGaA | 10129 |
1 |
ANDOH-Corporation limited partnership company | 4 |
1 |
Baoshan Iron & Steel Co., Ltd. | 832 |
1 |
Chemetall, Corp. | 5 |
1 |
DIPSOL Chemicals Co., Ltd. | 57 |
1 |
Nippon Hyomen Kagaku Kabushiki Kaisha | 5 |
1 |
NOROO Coil Coatings, Co., Ltd. | 18 |
1 |
Taisei Plas Co., Ltd. | 48 |
1 |
UACJ Corporation | 631 |
1 |
Chemcoaters, LLC | 9 |
1 |
Shenzhen Chao Weida Technology Co., Ltd | 41 |
1 |
Shenzhen Hengzhaozhi Technology Co., Ltd. | 64 |
1 |
Shenzhen Yingheng Technology Co., Ltd. | 13 |
1 |
Other owners | 0 |