- 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 22/36 - 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 fluorides or complex fluorides containing also phosphates
Patent holdings for IPC class C23C 22/36
Total number of patents in this class: 235
10-year publication summary
|
21
|
18
|
15
|
15
|
11
|
19
|
12
|
8
|
8
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Henkel AG & Co. KGaA | 10129 |
46 |
| Chemetall GmbH | 382 |
35 |
| Nippon Steel Corporation | 5649 |
23 |
| PPG Industries Ohio, Inc. | 3430 |
19 |
| Nisshin Steel Co., Ltd. | 401 |
15 |
| JFE Steel Corporation | 6067 |
11 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
10 |
| Nihon Parkerizing Co., Ltd. | 274 |
8 |
| ArcelorMittal | 1887 |
4 |
| Centre National de La Recherche Scientifique | 9632 |
3 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
3 |
| Kansai Paint Co., Ltd. | 659 |
3 |
| Universite de Pau et des Pays de L'adour | 85 |
3 |
| Nihon Parkerizing | 7 |
3 |
| Soule Peintures Industrielles Aero | 3 |
3 |
| Henkel Kommanditgesellschaft auf Aktien | 373 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
2 |
| Leibniz-institut fur Neue Materialien Gemeinnutzige GmbH | 116 |
2 |
| Nippon Paint Co., Ltd. | 105 |
2 |
| Nippon Paint Surf Chemicals Co., Ltd. | 82 |
2 |
| Other owners | 36 |