- 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 9/42 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for armour plate
Patent holdings for IPC class C21D 9/42
Total number of patents in this class: 41
10-year publication summary
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6
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5
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5
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3
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4
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2
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3
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1
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0
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ATI Properties LLC | 203 |
4 |
| ThyssenKrupp Steel Europe AG | 952 |
4 |
| ATI Properties, Inc. | 99 |
3 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
3 |
| Salzgitter Flachstahl GmbH | 158 |
3 |
| ThyssenKrupp AG | 3276 |
3 |
| Aktiebolaget SKF | 2934 |
2 |
| Manulatex France | 19 |
2 |
| Cambridge Enterprise Limited, The Old Schools | 4 |
2 |
| The Boeing Company | 20031 |
1 |
| Caterpillar Inc. | 9527 |
1 |
| The United States of America as represented by the Secretary of the Navy | 2743 |
1 |
| Benteler Automobiltechnik GmbH | 290 |
1 |
| Buffalo Armory LLC | 3 |
1 |
| Damascus Armour Development (Pty) Ltd. | 1 |
1 |
| Danmarks Tekniske Universitet | 963 |
1 |
| Ilsenburger Grobblech GmbH | 14 |
1 |
| JFE Steel Corporation | 6809 |
1 |
| Metso Minerals, Inc. | 109 |
1 |
| POSCO Co., Ltd. | 1558 |
1 |
| Other owners | 4 |