- 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 22/48 - 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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
Patent holdings for IPC class C23C 22/48
Total number of patents in this class: 153
10-year publication summary
10
|
6
|
12
|
9
|
17
|
6
|
8
|
7
|
2
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Henkel AG & Co. KGaA | 10129 |
14 |
Chemetall GmbH | 382 |
11 |
PPG Industries Ohio, Inc. | 3430 |
6 |
ArcelorMittal | 1887 |
6 |
Nihon Parkerizing Co., Ltd. | 274 |
6 |
The Boeing Company | 19843 |
5 |
Nippon Paint Co., Ltd. | 105 |
5 |
Atotech Deutschland GmbH | 586 |
4 |
Halliburton Energy Services, Inc. | 20165 |
3 |
Nippon Paint Surf Chemicals Co., Ltd. | 82 |
3 |
Nippon Steel Corporation | 5649 |
3 |
Okuno Chemical Industries Co., Ltd. | 95 |
3 |
General Electric Company | 18133 |
2 |
The Curators of the University of Missouri | 965 |
2 |
DIPSOL Chemicals Co., Ltd. | 57 |
2 |
JFE Steel Corporation | 6067 |
2 |
Nippon Chemical Industrial Co., Ltd. | 267 |
2 |
Shikoku Chemicals Corporation | 78 |
2 |
Toyo Seikan Group Holdings, Ltd. | 765 |
2 |
Yuken Industry Co., Ltd. | 60 |
2 |
Other owners | 68 |