- 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: 65
10-year publication summary
|
8
|
3
|
2
|
1
|
4
|
4
|
13
|
4
|
3
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7549 |
22 |
| ArcelorMittal | 2680 |
6 |
| TDK Corporation | 6876 |
4 |
| National Institute of Advanced Industrial Science and Technology | 3794 |
2 |
| ATI Properties LLC | 200 |
2 |
| JX Nippon Mining & Metals Corporation | 1461 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
2 |
| Ningbo Yunsheng Co., Ltd. | 12 |
2 |
| Safran Landing Systems | 775 |
2 |
| Ningbo Yunsheng Magnet Devices Technology Co., Ltd | 9 |
2 |
| SNECMA S.A. | 1146 |
1 |
| Massachusetts Institute of Technology | 10254 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2860 |
1 |
| Nippon Telegraph and Telephone Corporation | 15923 |
1 |
| Carleton University | 95 |
1 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
1 |
| Nippon Steel Corporation | 6895 |
1 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
1 |
| Outokumpu Oyj | 265 |
1 |
| POSCO Co., Ltd. | 2015 |
1 |
| Other owners | 9 |