- 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 3/06 - Extraction of hydrogen
Patent holdings for IPC class C21D 3/06
Total number of patents in this class: 56
10-year publication summary
|
4
|
8
|
3
|
2
|
1
|
4
|
4
|
13
|
4
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6806 |
16 |
| ArcelorMittal | 2254 |
6 |
| TDK Corporation | 6689 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
3 |
| National Institute of Advanced Industrial Science and Technology | 3792 |
2 |
| ATI Properties LLC | 203 |
2 |
| JX Nippon Mining & Metals Corporation | 1490 |
2 |
| Ningbo Yunsheng Co., Ltd. | 11 |
2 |
| Safran Landing Systems | 715 |
2 |
| Ningbo Yunsheng Magnet Devices Technology Co., Ltd | 8 |
2 |
| SNECMA S.A. | 1145 |
1 |
| Massachusetts Institute of Technology | 10024 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2738 |
1 |
| Nippon Telegraph and Telephone Corporation | 17228 |
1 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
1 |
| Nippon Steel Corporation | 6195 |
1 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
1 |
| Outokumpu Oyj | 261 |
1 |
| Shenyang General Magnetic Co., Ltd. | 18 |
1 |
| Snecma | 1064 |
1 |
| Other owners | 5 |