- 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: 140
10-year publication summary
|
11
|
11
|
10
|
6
|
14
|
6
|
9
|
5
|
11
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IHI Corporation | 3535 |
15 |
| IHI Machinery and Furnace Co., Ltd. | 76 |
12 |
| SECO / Warwick S.A. | 37 |
6 |
| Robert Bosch GmbH | 44176 |
4 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 74 |
4 |
| Toyota Motor Corporation | 35813 |
3 |
| Daido Steel Co., Ltd. | 284 |
3 |
| Dowa Thermotech Co., Ltd. | 53 |
3 |
| Swagelok Company | 316 |
3 |
| The United States of America as represented by the Secretary of the Navy | 2860 |
2 |
| LG Innotek Co., Ltd. | 8486 |
2 |
| Aisin AW Co., Ltd. | 2254 |
2 |
| JTEKT Corporation | 2593 |
2 |
| Aktiebolaget SKF | 3130 |
2 |
| ATI Properties LLC | 200 |
2 |
| Haynes International, Inc. | 109 |
2 |
| H.T. Solutions S.r.l. | 3 |
2 |
| Ipsen, Inc. | 27 |
2 |
| Nippon Piston Ring Co., Ltd. | 138 |
2 |
| Oda Industries Co., Ltd. | 3 |
2 |
| Other owners | 65 |