- 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 1/56 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
Patent holdings for IPC class C21D 1/56
Total number of patents in this class: 37
10-year publication summary
|
13
|
5
|
6
|
3
|
1
|
1
|
2
|
1
|
1
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2344 |
4 |
| Baoshan Iron & Steel Co., Ltd. | 969 |
3 |
| Houghton Technical Corp. | 109 |
3 |
| W. L. Gore & Associates, Inc. | 2733 |
2 |
| JFE Steel Corporation | 6992 |
2 |
| Nippon Steel Corporation | 6405 |
2 |
| GM Global Technology Operations LLC | 15220 |
1 |
| Caterpillar Inc. | 9659 |
1 |
| A & A FRATELLI PARODI, S.p.A. | 5 |
1 |
| Firth Rixson Limited | 4 |
1 |
| Fives Stein | 105 |
1 |
| Ipsen, Inc. | 27 |
1 |
| Montupet S.A. | 8 |
1 |
| Multimatic Inc. | 150 |
1 |
| POSCO | 2178 |
1 |
| Rolex S.A. | 680 |
1 |
| Safran Landing Systems Canada Inc. / Safran Systemes D'atterrissage Canada Inc. | 103 |
1 |
| SSAB Technology AB | 159 |
1 |
| Tata Steel Limited | 174 |
1 |
| Tenaris Coiled Tubes, LLC | 22 |
1 |
| Other owners | 7 |