- 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: 102
10-year publication summary
|
4
|
2
|
7
|
15
|
11
|
5
|
7
|
2
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2271 |
15 |
| Nippon Steel Corporation | 6203 |
10 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
4 |
| JFE Steel Corporation | 6809 |
4 |
| ThyssenKrupp AG | 3276 |
4 |
| ThyssenKrupp Steel Europe AG | 952 |
4 |
| Nihon Parkerizing Co., Ltd. | 286 |
3 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
3 |
| POSCO | 2188 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8685 |
2 |
| Nissan Motor Co., Ltd. | 12455 |
2 |
| NTN Corporation | 4984 |
2 |
| AK Steel Properties, Inc. | 75 |
2 |
| Audi AG | 7344 |
2 |
| Salzgitter Flachstahl GmbH | 158 |
2 |
| Sumitomo Metal Industries, Ltd. | 386 |
2 |
| Tata Steel Nederland Technology BV | 151 |
2 |
| Tateho Chemical Industries Co., Ltd. | 61 |
2 |
| Volkswagen AG | 7319 |
2 |
| Siemens AG | 24525 |
1 |
| Other owners | 31 |