- 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 1/773 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
Patent holdings for IPC class C21D 1/773
Total number of patents in this class: 128
10-year publication summary
|
21
|
11
|
11
|
10
|
6
|
14
|
6
|
9
|
5
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IHI Corporation | 3382 |
15 |
| IHI Machinery and Furnace Co., Ltd. | 78 |
12 |
| SECO / Warwick S.A. | 31 |
4 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 60 |
4 |
| Toyota Motor Corporation | 30988 |
3 |
| Robert Bosch GmbH | 42222 |
3 |
| Daido Steel Co., Ltd. | 261 |
3 |
| Swagelok Company | 317 |
3 |
| Laser Engineering Applications | 25 |
3 |
| The United States of America as represented by the Secretary of the Navy | 2737 |
2 |
| LG Innotek Co., Ltd. | 7415 |
2 |
| Aisin AW Co., Ltd. | 2346 |
2 |
| JTEKT Corporation | 2470 |
2 |
| Aktiebolaget SKF | 2905 |
2 |
| ATI Properties LLC | 204 |
2 |
| H.T. Solutions S.r.l. | 3 |
2 |
| Ipsen, Inc. | 27 |
2 |
| Nippon Piston Ring Co., Ltd. | 133 |
2 |
| Oda Industries Co., Ltd. | 3 |
2 |
| POSCO Co., Ltd. | 1365 |
2 |
| Other owners | 56 |