- 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 8/32 - Carbo-nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/32
Total number of patents in this class: 292
10-year publication summary
24
|
27
|
25
|
22
|
18
|
9
|
13
|
21
|
10
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
NTN Corporation | 5008 |
44 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
17 |
Swagelok Company | 325 |
15 |
Nippon Steel Corporation | 5649 |
12 |
Aktiebolaget SKF | 2700 |
11 |
Robert Bosch GmbH | 40953 |
10 |
Honda Motor Co., Ltd. | 24537 |
7 |
ECM Technologies | 29 |
7 |
JFE Steel Corporation | 6067 |
7 |
GM Global Technology Operations LLC | 13620 |
6 |
JTEKT Corporation | 2423 |
6 |
Aubert & Duval | 106 |
6 |
Nihon Parkerizing Co., Ltd. | 274 |
6 |
Case Western Reserve University | 1727 |
4 |
Peugeot Citroen Automobiles SA | 1903 |
4 |
NSK Ltd. | 2719 |
3 |
Akebono Brake Industry Co., Ltd. | 354 |
3 |
Miba Sinter Austria GmbH | 101 |
3 |
Oerlikon Surface Solutions AG, Pfaffikon | 556 |
3 |
Caterpillar Inc. | 8877 |
2 |
Other owners | 116 |