- 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 1/70 - Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
Patent holdings for IPC class C21D 1/70
Total number of patents in this class: 104
10-year publication summary
|
2
|
7
|
15
|
11
|
5
|
7
|
2
|
2
|
5
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2663 |
15 |
| Nippon Steel Corporation | 6843 |
14 |
| JFE Steel Corporation | 7508 |
5 |
| ArcelorMittal Investigacion y Desarrollo SL | 207 |
4 |
| ThyssenKrupp Steel Europe AG | 989 |
4 |
| Nihon Parkerizing Co., Ltd. | 296 |
3 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
3 |
| POSCO | 2147 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 9115 |
2 |
| Nissan Motor Co., Ltd. | 12947 |
2 |
| NTN Corporation | 4915 |
2 |
| AK Steel Properties, Inc. | 74 |
2 |
| Audi AG | 7559 |
2 |
| Salzgitter Flachstahl GmbH | 163 |
2 |
| Tata Steel Nederland Technology BV | 161 |
2 |
| Tateho Chemical Industries Co., Ltd. | 60 |
2 |
| ThyssenKrupp AG | 3423 |
2 |
| Volkswagen AG | 7457 |
2 |
| Takara Standard Co.,Ltd. | 4 |
2 |
| Siemens AG | 24033 |
1 |
| Other owners | 30 |