- 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 1/52 - Methods of heating with flames
Patent holdings for IPC class C21D 1/52
Total number of patents in this class: 78
10-year publication summary
|
11
|
3
|
7
|
8
|
3
|
5
|
5
|
2
|
2
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Fives Stein | 105 |
5 |
| JFE Steel Corporation | 6840 |
5 |
| Linde Aktiengesellschaft | 1506 |
5 |
| AGA AB | 11 |
4 |
| ArcelorMittal | 2285 |
3 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
3 |
| Baoshan Iron & Steel Co., Ltd. | 964 |
3 |
| Tenova S.p.A. | 156 |
3 |
| ThyssenKrupp Steel Europe AG | 955 |
3 |
| Voestalpine Stahl GmbH | 355 |
3 |
| Air Products and Chemicals, Inc. | 1423 |
2 |
| Novelis Inc. | 750 |
2 |
| POSCO Co., Ltd. | 1568 |
2 |
| Voestalpine Metal Forming GmbH | 77 |
2 |
| Illinois Tool Works Inc. | 11470 |
1 |
| GM Global Technology Operations LLC | 15042 |
1 |
| Siemens VAI Metals Technologies SAS | 63 |
1 |
| Aleris Aluminum Duffel BVBA | 33 |
1 |
| Benteler Automobiltechnik GmbH | 290 |
1 |
| HYL Technologies, S.A. de C.V. | 43 |
1 |
| Other owners | 27 |