- 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 1/84 - Controlled slow cooling
Patent holdings for IPC class C21D 1/84
Total number of patents in this class: 178
10-year publication summary
|
31
|
2
|
8
|
3
|
9
|
3
|
7
|
20
|
65
|
21
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO Co., Ltd. | 1558 |
28 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
18 |
| JFE Steel Corporation | 6809 |
17 |
| Nippon Steel Corporation | 6203 |
17 |
| ArcelorMittal | 2271 |
12 |
| The Boeing Company | 20031 |
3 |
| Salzgitter Flachstahl GmbH | 158 |
3 |
| Jiangsu Shagang Group Co., Ltd. | 90 |
3 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 64 |
3 |
| GM Global Technology Operations LLC | 14937 |
2 |
| Northwestern University | 3374 |
2 |
| Aperam | 118 |
2 |
| Daido Steel Co., Ltd. | 269 |
2 |
| Hyundai Steel Company | 425 |
2 |
| ThyssenKrupp Steel Europe AG | 952 |
2 |
| Voestalpine Stahl GmbH | 354 |
2 |
| Tecniforja - Forjagem e Estampagem de Peças Técnicas, Lda | 3 |
2 |
| NIPPON STEEL Stainless Steel Corporation | 287 |
2 |
| Daye Special Steel Co., Ltd. | 17 |
2 |
| Siemens AG | 24525 |
1 |
| Other owners | 53 |