- 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 1/62 - Quenching devices
Patent holdings for IPC class C21D 1/62
Total number of patents in this class: 179
10-year publication summary
|
23
|
12
|
14
|
19
|
17
|
20
|
11
|
4
|
4
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IHI Corporation | 3413 |
9 |
| IHI Machinery and Furnace Co., Ltd. | 78 |
9 |
| Manchester Copper Products, LLC | 16 |
7 |
| JFE Steel Corporation | 6794 |
6 |
| Nippon Steel Corporation | 6181 |
6 |
| ArcelorMittal | 2248 |
4 |
| Consolidated Engineering Company, Inc. | 27 |
4 |
| SECO / Warwick S.A. | 34 |
4 |
| Voestalpine Stahl GmbH | 353 |
4 |
| Robert Bosch GmbH | 42505 |
3 |
| ALD Vacuum Technologies GmbH | 138 |
3 |
| Ebner Industrieofenbau GmbH | 142 |
3 |
| ECM Technologies | 29 |
3 |
| Ipsen, Inc. | 27 |
3 |
| Metglas, Inc. | 48 |
3 |
| Rolls-Royce Corporation | 1727 |
3 |
| Thermatool Corp. | 46 |
3 |
| Laser Engineering Applications | 26 |
3 |
| Mubea Performance Wheels GmbH | 8 |
3 |
| The Boeing Company | 20025 |
2 |
| Other owners | 94 |