- 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 22/68 - 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 solutions with pH between 6 and 8
Patent holdings for IPC class C23C 22/68
Total number of patents in this class: 216
10-year publication summary
23
|
14
|
15
|
22
|
33
|
15
|
7
|
6
|
7
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
ArcelorMittal | 1887 |
15 |
PRC-DeSoto International, Inc. | 567 |
8 |
Chemetall GmbH | 382 |
8 |
Nihon Parkerizing Co., Ltd. | 274 |
7 |
Nippon Steel Corporation | 5649 |
7 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
6 |
Henkel AG & Co. KGaA | 10129 |
5 |
Denso Corporation | 23338 |
4 |
Audi AG | 7153 |
4 |
JFE Steel Corporation | 6067 |
4 |
Nisshin Steel Co., Ltd. | 401 |
4 |
Okuno Chemical Industries Co., Ltd. | 95 |
4 |
Hitachi, Ltd. | 16452 |
3 |
MEC Company Ltd. | 76 |
3 |
Novelis Inc. | 656 |
3 |
Suez Groupe | 171 |
3 |
Toyo Kohan Co., Ltd. | 413 |
3 |
Illinois Tool Works Inc. | 11152 |
2 |
Toyota Motor Corporation | 28582 |
2 |
The Boeing Company | 19843 |
2 |
Other owners | 119 |