- 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 1/22 - Martempering
Patent holdings for IPC class C21D 1/22
Total number of patents in this class: 132
10-year publication summary
14
|
8
|
16
|
14
|
17
|
18
|
12
|
12
|
17
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
ArcelorMittal | 1887 |
53 |
JFE Steel Corporation | 6067 |
9 |
Nippon Steel Corporation | 5649 |
5 |
AK Steel Properties, Inc. | 75 |
4 |
Tenaris Coiled Tubes, LLC | 21 |
4 |
Tata Steel Nederland Technology BV | 143 |
3 |
United States Steel Corporation | 168 |
3 |
Toyota Motor Corporation | 28582 |
2 |
C.D. Wälzholz GmbH | 36 |
2 |
Compania Electro Metalurgica S.A. | 37 |
2 |
SSAB Technology AB | 148 |
2 |
ThyssenKrupp Steel Europe AG | 924 |
2 |
SNECMA S.A. | 1160 |
1 |
Canon Inc. | 36841 |
1 |
Hitachi Metals, Ltd. | 2175 |
1 |
ZF Friedrichshafen AG | 6820 |
1 |
Schaeffler Technologies AG & Co. KG | 8880 |
1 |
Agency for Defense Development | 375 |
1 |
Aktiebolaget SKF | 2700 |
1 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
1 |
Other owners | 33 |