- 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 8/18 - Oxidising of ferrous surfaces
Patent holdings for IPC class C23C 8/18
Total number of patents in this class: 101
10-year publication summary
9
|
15
|
6
|
12
|
7
|
7
|
9
|
5
|
7
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nippon Steel Corporation | 5649 |
13 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
7 |
Encell Technology, Inc. | 56 |
6 |
NOVA Chemicals (International) S.A. | 717 |
6 |
Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
4 |
JFE Steel Corporation | 6067 |
3 |
Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
3 |
Nisshin Steel Co., Ltd. | 401 |
3 |
POSCO | 2222 |
3 |
Sumitomo Electric Industries, Ltd. | 14131 |
2 |
Robert Bosch GmbH | 40953 |
2 |
Hitachi-GE Nuclear Energy, Ltd. | 261 |
2 |
Kubota Corporation | 3054 |
2 |
NSK Americas, Inc. | 34 |
2 |
Osaka Gas Co., Ltd. | 312 |
2 |
POSCO Co., Ltd. | 1059 |
2 |
Regents of the University of Minnesota | 2620 |
2 |
Liberty Performance Steels Limited | 4 |
2 |
Mannesmann Precision Tubes France | 2 |
2 |
BASF SE | 19740 |
1 |
Other owners | 32 |