- 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 22/44 - 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 molybdates, tungstates or vanadates containing also fluorides or complex fluorides
Patent holdings for IPC class C23C 22/44
Total number of patents in this class: 152
10-year publication summary
12
|
6
|
10
|
18
|
12
|
9
|
1
|
9
|
5
|
2
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Chemetall GmbH | 382 |
20 |
Henkel AG & Co. KGaA | 10129 |
15 |
PPG Industries Ohio, Inc. | 3430 |
8 |
Nippon Paint Surf Chemicals Co., Ltd. | 82 |
8 |
Nippon Steel Corporation | 5649 |
8 |
Nisshin Steel Co., Ltd. | 401 |
8 |
JFE Steel Corporation | 6067 |
7 |
Nihon Parkerizing Co., Ltd. | 274 |
6 |
Nippon Paint Co., Ltd. | 105 |
5 |
Bulk Chemicals, Inc. | 42 |
4 |
Shenzhen Hengzhaozhi Technology Co., Ltd. | 64 |
4 |
Centre National de La Recherche Scientifique | 9632 |
3 |
Denso Corporation | 23338 |
3 |
Baoshan Iron & Steel Co., Ltd. | 832 |
3 |
Kansai Paint Co., Ltd. | 659 |
3 |
POSCO Co., Ltd. | 1059 |
3 |
Universite de Pau et des Pays de L'adour | 85 |
3 |
Soule Peintures Industrielles Aero | 3 |
3 |
The Boeing Company | 19843 |
2 |
JFE Galvanizing & Coating Co., Ltd. | 31 |
2 |
Other owners | 34 |