- All sections
- C - Chemistrymetallurgy
- C21D - Modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or non-ferrous metals or alloysmaking metal malleable, e.g. by decarburisation or tempering
- C21D 1/20 - Isothermal quenching, e.g. bainitic hardening
Patent holdings for IPC class C21D 1/20
Total number of patents in this class: 180
10-year publication summary
|
15
|
17
|
19
|
15
|
14
|
16
|
15
|
10
|
11
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2285 |
20 |
| Aktiebolaget SKF | 2945 |
12 |
| JFE Steel Corporation | 6840 |
12 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
6 |
| ArcelorMittal Wire France | 42 |
6 |
| Schaeffler Technologies AG & Co. KG | 9873 |
5 |
| Kobe Steel, Ltd. | 872 |
5 |
| ThyssenKrupp Steel Europe AG | 955 |
5 |
| Robert Bosch GmbH | 42689 |
4 |
| Tata Steel Nederland Technology BV | 151 |
4 |
| United States Steel Corporation | 174 |
4 |
| Voestalpine Schienen GmbH | 14 |
4 |
| Baoshan Iron & Steel Co., Ltd. | 964 |
3 |
| Nippon Steel Corporation | 6238 |
3 |
| Voestalpine Stahl GmbH | 355 |
3 |
| Benteler Automobiltechnik GmbH | 290 |
2 |
| Compania Electro Metalurgica S.A. | 39 |
2 |
| Dayton Progress Corporation | 32 |
2 |
| Indian Institute of Technology Bombay | 259 |
2 |
| Politechnika Warszawska | 73 |
2 |
| Other owners | 74 |