- 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: 149
10-year publication summary
|
14
|
11
|
17
|
3
|
13
|
16
|
12
|
8
|
12
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2462 |
43 |
| Schwartz GmbH | 58 |
10 |
| Nippon Steel Corporation | 6607 |
9 |
| ThyssenKrupp Steel Europe AG | 972 |
6 |
| AK Steel Properties, Inc. | 75 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
4 |
| Baoshan Iron & Steel Co., Ltd. | 1049 |
4 |
| POSCO Co., Ltd. | 1635 |
4 |
| GM Global Technology Operations LLC | 15617 |
3 |
| ArcelorMittal France | 82 |
3 |
| JFE Steel Corporation | 7199 |
3 |
| Tata Steel Nederland Technology BV | 154 |
3 |
| ThyssenKrupp AG | 3402 |
3 |
| United States Steel Corporation | 168 |
3 |
| Hitachi Metals, Ltd. | 1936 |
2 |
| Northwestern University | 3489 |
2 |
| Ascometal | 3 |
2 |
| Dayton Progress Corporation | 34 |
2 |
| NV Bekaert SA | 733 |
2 |
| POSCO | 2154 |
2 |
| Other owners | 35 |