- 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 1/673 - Quenching devices for die quenching
Patent holdings for IPC class C21D 1/673
Total number of patents in this class: 675
10-year publication summary
|
47
|
82
|
64
|
68
|
48
|
41
|
36
|
23
|
46
|
24
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2254 |
97 |
| ThyssenKrupp Steel Europe AG | 952 |
52 |
| Nippon Steel Corporation | 6195 |
33 |
| Voestalpine Stahl GmbH | 354 |
30 |
| Schwartz GmbH | 58 |
23 |
| ThyssenKrupp AG | 3273 |
20 |
| Voestalpine Metal Forming GmbH | 76 |
20 |
| Autotech Engineering S.L. | 151 |
20 |
| Benteler Automobiltechnik GmbH | 290 |
17 |
| JFE Steel Corporation | 6806 |
17 |
| Bayerische Motoren Werke Aktiengesellschaft | 14265 |
15 |
| Magna International Inc. | 1223 |
15 |
| Tata Steel Ijmuiden B.V. | 305 |
15 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
14 |
| Volkswagen AG | 7312 |
12 |
| Gestamp HardTech AB | 107 |
11 |
| Ford Global Technologies, LLC | 20498 |
10 |
| GM Global Technology Operations LLC | 14926 |
9 |
| POSCO Co., Ltd. | 1558 |
8 |
| Salzgitter Flachstahl GmbH | 158 |
8 |
| Other owners | 229 |