- 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 22/74 - 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 characterised by the process for obtaining burned-in conversion coatings
Patent holdings for IPC class C23C 22/74
Total number of patents in this class: 140
10-year publication summary
|
12
|
11
|
12
|
10
|
3
|
10
|
6
|
10
|
2
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
22 |
| Nippon Steel Corporation | 5649 |
17 |
| Chemetall GmbH | 382 |
9 |
| PPG Industries Ohio, Inc. | 3430 |
5 |
| POSCO Co., Ltd. | 1059 |
5 |
| Praxair S.T. Technology, Inc. | 133 |
5 |
| Siemens AG | 24990 |
4 |
| Atotech Deutschland GmbH | 586 |
4 |
| BASF SE | 19740 |
3 |
| The Boeing Company | 19843 |
3 |
| Henkel AG & Co. KGaA | 10129 |
3 |
| a et a Mader | 26 |
3 |
| ArcelorMittal | 1887 |
3 |
| C3 International, LLC | 9 |
3 |
| KS Aluminium-Technologie AG | 8 |
3 |
| Quaker Chemical Corporation | 212 |
2 |
| Tata Steel Nederland Technology BV | 143 |
2 |
| ThyssenKrupp Electrical Steel GmbH | 25 |
2 |
| Gerhard Heiche GmbH | 2 |
2 |
| M-m-morant-gmbh | 6 |
2 |
| Other owners | 38 |