- 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 1/19 - HardeningQuenching with or without subsequent tempering by interrupted quenching
Patent holdings for IPC class C21D 1/19
Total number of patents in this class: 153
10-year publication summary
|
15
|
13
|
20
|
4
|
13
|
18
|
16
|
9
|
14
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2672 |
45 |
| Schwartz GmbH | 60 |
10 |
| Nippon Steel Corporation | 6871 |
9 |
| ThyssenKrupp Steel Europe AG | 990 |
6 |
| Baoshan Iron & Steel Co., Ltd. | 1102 |
5 |
| AK Steel Properties, Inc. | 74 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 207 |
4 |
| POSCO Co., Ltd. | 2012 |
4 |
| GM Global Technology Operations LLC | 16124 |
3 |
| JFE Steel Corporation | 7527 |
3 |
| Salzgitter Flachstahl GmbH | 163 |
3 |
| Tata Steel Nederland Technology BV | 161 |
3 |
| United States Steel Corporation | 172 |
3 |
| Hitachi Metals, Ltd. | 1898 |
2 |
| Northwestern University | 3543 |
2 |
| ArcelorMittal France | 69 |
2 |
| Ascometal | 3 |
2 |
| Dayton Progress Corporation | 35 |
2 |
| Hardwire, LLC | 53 |
2 |
| NV Bekaert SA | 725 |
2 |
| Other owners | 37 |