- 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 1/78 - Combined heat-treatments not provided for above
Patent holdings for IPC class C21D 1/78
Total number of patents in this class: 78
10-year publication summary
|
9
|
7
|
4
|
6
|
7
|
6
|
6
|
5
|
3
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2271 |
4 |
| United States Steel Corporation | 174 |
4 |
| POSCO | 2188 |
3 |
| The Texas a & M University System | 1684 |
3 |
| Voestalpine Stahl GmbH | 354 |
3 |
| Siemens AG | 24525 |
2 |
| Schaeffler Technologies AG & Co. KG | 9807 |
2 |
| AK Steel Properties, Inc. | 75 |
2 |
| Aktiebolaget SKF | 2934 |
2 |
| JFE Steel Corporation | 6809 |
2 |
| Tata Steel Limited | 175 |
2 |
| ThyssenKrupp Steel Europe AG | 952 |
2 |
| COLDfire Technology, LLC | 2 |
2 |
| Buffalo Armory Group, LLC | 2 |
2 |
| General Electric Company | 13829 |
1 |
| Honda Motor Co., Ltd. | 25166 |
1 |
| Sumitomo Electric Industries, Ltd. | 15414 |
1 |
| Robert Bosch GmbH | 42614 |
1 |
| Koninklijke Philips Electronics N.V. | 9805 |
1 |
| Caterpillar Inc. | 9527 |
1 |
| Other owners | 37 |