- All sections
- C - Chemistry; metallurgy
- C21D - Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making metal malleable, e.g. by decarburisation or tempering
- C21D 5/00 - Heat treatment of cast-iron
Patent holdings for IPC class C21D 5/00
Total number of patents in this class: 124
10-year publication summary
8
|
9
|
13
|
5
|
2
|
11
|
5
|
9
|
5
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Hitachi Metals, Ltd. | 2175 |
7 |
Robert Bosch GmbH | 40953 |
5 |
Hyundai Motor Company | 19021 |
5 |
Federal-Mogul Burscheid GmbH | 284 |
4 |
Zanardi Fonderie S.p.A. | 7 |
4 |
JFE Steel Corporation | 6067 |
3 |
Toshiba Kikai Kabushiki Kaisha | 300 |
3 |
UD Trucks Corporation | 137 |
3 |
Wartsila Finland Oy | 740 |
3 |
GE Infrastructure Technology, LLC | 5873 |
3 |
Indexator AB | 5 |
3 |
Nippon Steel Rolls Corporation | 4 |
3 |
Caterpillar Inc. | 8877 |
2 |
Kia Motors Corporation | 7946 |
2 |
Kabushiki Kaisha Riken | 265 |
2 |
L.E. Jones Company, LLC | 16 |
2 |
TDI Value Web B.V. | 2 |
2 |
Tenneco Inc | 274 |
2 |
Ausferritic AB | 9 |
2 |
Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 699 |
2 |
Other owners | 62 |