- 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: 77
10-year publication summary
|
9
|
7
|
4
|
6
|
7
|
6
|
6
|
5
|
3
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2072 |
4 |
| United States Steel Corporation | 173 |
4 |
| POSCO | 2204 |
3 |
| The Texas a & M University System | 1602 |
3 |
| Voestalpine Stahl GmbH | 347 |
3 |
| Siemens AG | 24568 |
2 |
| Schaeffler Technologies AG & Co. KG | 9405 |
2 |
| AK Steel Properties, Inc. | 75 |
2 |
| Aktiebolaget SKF | 2846 |
2 |
| JFE Steel Corporation | 6580 |
2 |
| Tata Steel Limited | 190 |
2 |
| ThyssenKrupp Steel Europe AG | 956 |
2 |
| COLDfire Technology, LLC | 2 |
2 |
| Buffalo Armory Group, LLC | 2 |
2 |
| General Electric Company | 17794 |
1 |
| Honda Motor Co., Ltd. | 24878 |
1 |
| Sumitomo Electric Industries, Ltd. | 14990 |
1 |
| Robert Bosch GmbH | 41823 |
1 |
| Koninklijke Philips Electronics N.V. | 10809 |
1 |
| Caterpillar Inc. | 9185 |
1 |
| Other owners | 36 |