- All sections
- C - Chemistrymetallurgy
- C23C - Coating metallic materialcoating material with metallic materialsurface treatment of metallic material by diffusion into the surface, by chemical conversion or substitutioncoating 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: 580
10-year publication summary
|
28
|
33
|
33
|
37
|
75
|
29
|
31
|
26
|
30
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6321 |
125 |
| JFE Steel Corporation | 6892 |
100 |
| Henkel AG & Co. KGaA | 10601 |
25 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
20 |
| ArcelorMittal | 2317 |
7 |
| PPG Industries Ohio, Inc. | 3442 |
6 |
| Chemetall GmbH | 377 |
6 |
| Novelis Inc. | 754 |
6 |
| POSCO | 2184 |
6 |
| Tateho Chemical Industries Co., Ltd. | 59 |
6 |
| Nihon Parkerizing Co., Ltd. | 289 |
5 |
| Nippon Paint Surf Chemicals Co., Ltd. | 95 |
5 |
| Retomax AG | 6 |
5 |
| SK Nexilis Co., Ltd. | 77 |
5 |
| The Boeing Company | 20098 |
4 |
| Hewlett-Packard Development Company, L.P. | 25829 |
4 |
| Bulk Chemicals, Inc. | 42 |
4 |
| Ecolab USA Inc. | 5509 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2875 |
4 |
| Messier-Bugatti-Dowty | 227 |
4 |
| Other owners | 229 |