- 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 1/19 - Hardening; Quenching with or without subsequent tempering by interrupted quenching
Patent holdings for IPC class C21D 1/19
Total number of patents in this class: 132
10-year publication summary
|
7
|
15
|
13
|
20
|
4
|
13
|
16
|
14
|
7
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2064 |
37 |
| Schwartz GmbH | 58 |
10 |
| Nippon Steel Corporation | 6012 |
7 |
| ThyssenKrupp Steel Europe AG | 956 |
6 |
| AK Steel Properties, Inc. | 75 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
4 |
| GM Global Technology Operations LLC | 14260 |
3 |
| ArcelorMittal France | 102 |
3 |
| ThyssenKrupp AG | 3207 |
3 |
| United States Steel Corporation | 173 |
3 |
| Hitachi Metals, Ltd. | 2021 |
2 |
| Northwestern University | 3276 |
2 |
| Ascometal | 4 |
2 |
| Baoshan Iron & Steel Co., Ltd. | 897 |
2 |
| Dayton Progress Corporation | 32 |
2 |
| JFE Steel Corporation | 6557 |
2 |
| NV Bekaert SA | 758 |
2 |
| POSCO | 2204 |
2 |
| POSCO Co., Ltd. | 1302 |
2 |
| Tata Steel Ijmuiden B.V. | 300 |
2 |
| Other owners | 32 |