- 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 8/56 - Carbo-nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/56
Total number of patents in this class: 43
10-year publication summary
6
|
0
|
4
|
4
|
2
|
1
|
3
|
3
|
1
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
H.e.f. | 127 |
5 |
Caterpillar Inc. | 8877 |
3 |
Aktiebolaget SKF | 2700 |
3 |
Hydromecanique et Frottement | 86 |
3 |
NTN Corporation | 5008 |
2 |
Dk-lok Corporation | 15 |
2 |
MAHLE International GmbH | 2670 |
2 |
Nihon Parkerizing Co., Ltd. | 274 |
2 |
Nippon Steel Corporation | 5649 |
2 |
Varel Mining and Industrial LLC | 9 |
2 |
Honda Motor Co., Ltd. | 24537 |
1 |
United Technologies Corporation | 2328 |
1 |
GM Global Technology Operations LLC | 13620 |
1 |
Applied Nano Surfaces Sweden AB | 7 |
1 |
Durferrit GmbH | 39 |
1 |
Frank's International, LLC | 241 |
1 |
Kolene Corporation | 33 |
1 |
Lodge Manufacturing Company | 74 |
1 |
Miba Sinter Austria GmbH | 101 |
1 |
Neturen Co., Ltd. | 193 |
1 |
Other owners | 7 |