- 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 1/64 - Quenching devices for bath quenching with circulating liquids
Patent holdings for IPC class C21D 1/64
Total number of patents in this class: 44
10-year publication summary
|
5
|
2
|
4
|
6
|
7
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4
|
1
|
0
|
1
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2285 |
5 |
| NV Bekaert SA | 747 |
5 |
| IHI Corporation | 3426 |
4 |
| IHI Machinery and Furnace Co., Ltd. | 79 |
4 |
| Danieli & C. Officine Meccaniche S.p.A. | 714 |
3 |
| Rolls-Royce Corporation | 1736 |
3 |
| Nippon Steel Corporation | 6238 |
2 |
| Tenaris Coiled Tubes, LLC | 22 |
2 |
| The Procter & Gamble Company | 22017 |
1 |
| Aisin AW Co., Ltd. | 2327 |
1 |
| JTEKT Corporation | 2491 |
1 |
| ALD Vacuum Technologies GmbH | 139 |
1 |
| Automation, Press and Tooling, A.P.& T. Aktiebolag | 40 |
1 |
| Hardwire, LLC | 45 |
1 |
| Houghton Technical Corp. | 110 |
1 |
| Ipsen, Inc. | 27 |
1 |
| SMS Group GmbH | 1125 |
1 |
| Taiyo Nippon Sanso Corporation | 369 |
1 |
| Mitsubishi Heavy Industries Machinery Systems, Ltd. | 443 |
1 |
| Aerospace Transmission Technologies GmbH | 13 |
1 |
| Other owners | 4 |