- 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 22/00 - 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
Patent holdings for IPC class C23C 22/00
Total number of patents in this class: 551
10-year publication summary
|
30
|
28
|
34
|
37
|
42
|
78
|
37
|
28
|
24
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5649 |
100 |
| JFE Steel Corporation | 6067 |
96 |
| Henkel AG & Co. KGaA | 10129 |
25 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
20 |
| Chemetall GmbH | 382 |
8 |
| ArcelorMittal | 1887 |
7 |
| PPG Industries Ohio, Inc. | 3430 |
6 |
| Nihon Parkerizing Co., Ltd. | 274 |
6 |
| Novelis Inc. | 656 |
6 |
| POSCO | 2222 |
6 |
| Tateho Chemical Industries Co., Ltd. | 64 |
6 |
| Nippon Paint Surf Chemicals Co., Ltd. | 82 |
5 |
| Retomax AG | 7 |
5 |
| The Boeing Company | 19843 |
4 |
| Hewlett-Packard Development Company, L.P. | 28538 |
4 |
| Bulk Chemicals, Inc. | 42 |
4 |
| Ecolab USA Inc. | 5190 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
| Messier-Bugatti-Dowty | 243 |
4 |
| Turbomeca | 232 |
4 |
| Other owners | 227 |