- 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: 48
10-year publication summary
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2
|
4
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6
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7
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4
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1
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0
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1
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3
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2672 |
5 |
| NV Bekaert SA | 725 |
5 |
| IHI Corporation | 3535 |
4 |
| IHI Machinery and Furnace Co., Ltd. | 76 |
4 |
| Danieli & C. Officine Meccaniche S.p.A. | 720 |
3 |
| Rolls-Royce Corporation | 1677 |
3 |
| Hardwire, LLC | 53 |
2 |
| Nippon Steel Corporation | 6871 |
2 |
| Tenaris Coiled Tubes, LLC | 23 |
2 |
| Aisin Corporation | 1914 |
2 |
| The Procter & Gamble Company | 21855 |
1 |
| Aisin AW Co., Ltd. | 2254 |
1 |
| JTEKT Corporation | 2583 |
1 |
| ALD Vacuum Technologies GmbH | 141 |
1 |
| Automation, Press and Tooling, A.P.& T. Aktiebolag | 37 |
1 |
| Chugai Ro Co., Ltd. | 130 |
1 |
| Houghton Technical Corp. | 105 |
1 |
| Ipsen, Inc. | 27 |
1 |
| SMS Group GmbH | 1197 |
1 |
| Taiyo Nippon Sanso Corporation | 365 |
1 |
| Other owners | 6 |