- 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 22/34 - 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: 562
10-year publication summary
45
|
42
|
29
|
36
|
49
|
35
|
29
|
19
|
20
|
4
|
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 |
90 |
Chemetall GmbH | 382 |
69 |
Nihon Parkerizing Co., Ltd. | 274 |
44 |
PPG Industries Ohio, Inc. | 3430 |
41 |
JFE Steel Corporation | 6067 |
20 |
Nippon Paint Co., Ltd. | 105 |
17 |
Nippon Steel Corporation | 5649 |
17 |
Nippon Paint Surf Chemicals Co., Ltd. | 82 |
14 |
Bulk Chemicals, Inc. | 42 |
12 |
Nisshin Steel Co., Ltd. | 401 |
12 |
Atotech Deutschland GmbH | 586 |
11 |
The Boeing Company | 19843 |
9 |
PRC-DeSoto International, Inc. | 567 |
9 |
Kansai Paint Co., Ltd. | 659 |
9 |
Shenzhen Hengzhaozhi Technology Co., Ltd. | 64 |
9 |
Rhodia Operations | 1645 |
8 |
The United States of America as represented by the Secretary of the Navy | 2734 |
7 |
DIPSOL Chemicals Co., Ltd. | 57 |
6 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
4 |
POSCO Co., Ltd. | 1059 |
4 |
Other owners | 150 |