- 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 22/30 - 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 trivalent chromium
Patent holdings for IPC class C23C 22/30
Total number of patents in this class: 61
10-year publication summary
|
2
|
3
|
6
|
4
|
3
|
6
|
1
|
2
|
2
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bulk Chemicals, Inc. | 42 |
7 |
| Yuken Industry Co., Ltd. | 60 |
6 |
| Henkel AG & Co. KGaA | 10129 |
5 |
| Nihon Parkerizing Co., Ltd. | 274 |
5 |
| DIPSOL Chemicals Co., Ltd. | 57 |
4 |
| JFE Steel Corporation | 6067 |
4 |
| Atotech Deutschland GmbH | 586 |
3 |
| PPG Industries Ohio, Inc. | 3430 |
2 |
| ArcelorMittal | 1887 |
2 |
| Chemeon Surface Technology, LLC | 18 |
2 |
| Nippon Hyomen Kagaku Kabushiki Kaisha | 5 |
2 |
| Nippon Steel & Sumikin Hardfacing Co., Ltd. | 22 |
2 |
| Vallourec Oil and Gas France | 450 |
2 |
| Honda Motor Co., Ltd. | 24537 |
1 |
| The Boeing Company | 19843 |
1 |
| United Technologies Corporation | 2328 |
1 |
| Nissan Motor Co., Ltd. | 12249 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2734 |
1 |
| Hamilton Sundstrand Corporation | 4525 |
1 |
| NTN Corporation | 5008 |
1 |
| Other owners | 8 |