- 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 22/34 - 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
Patent holdings for IPC class C23C 22/34
Total number of patents in this class: 568
10-year publication summary
|
40
|
27
|
32
|
44
|
32
|
30
|
16
|
19
|
23
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Henkel AG & Co. KGaA | 10656 |
99 |
| Chemetall GmbH | 374 |
68 |
| Nihon Parkerizing Co., Ltd. | 291 |
46 |
| PPG Industries Ohio, Inc. | 3415 |
41 |
| JFE Steel Corporation | 7074 |
20 |
| Nippon Steel Corporation | 6514 |
17 |
| Nippon Paint Surf Chemicals Co., Ltd. | 96 |
16 |
| Nippon Paint Co., Ltd. | 93 |
14 |
| Bulk Chemicals, Inc. | 42 |
12 |
| Nisshin Steel Co., Ltd. | 394 |
12 |
| The Boeing Company | 20186 |
10 |
| Atotech Deutschland GmbH | 550 |
10 |
| Kansai Paint Co., Ltd. | 664 |
9 |
| Shenzhen Hengzhaozhi Technology Co., Ltd. | 64 |
9 |
| PRC-DeSoto International, Inc. | 567 |
8 |
| Rhodia Operations | 1553 |
8 |
| DIPSOL Chemicals Co., Ltd. | 63 |
7 |
| Chemeon Surface Technology, LLC | 26 |
6 |
| The United States of America as represented by the Secretary of the Navy | 2804 |
5 |
| Carrier Corporation | 4007 |
5 |
| Other owners | 146 |