- All sections
- C - Chemistry; metallurgy
- C21D - Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making 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: 156
10-year publication summary
|
31
|
2
|
8
|
3
|
9
|
3
|
7
|
20
|
65
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO Co., Ltd. | 1290 |
25 |
| Nippon Steel Corporation | 5982 |
17 |
| Baoshan Iron & Steel Co., Ltd. | 888 |
16 |
| JFE Steel Corporation | 6527 |
14 |
| ArcelorMittal | 2047 |
10 |
| The Boeing Company | 19900 |
3 |
| Salzgitter Flachstahl GmbH | 156 |
3 |
| Northwestern University | 3271 |
2 |
| Aperam | 114 |
2 |
| Daido Steel Co., Ltd. | 258 |
2 |
| ThyssenKrupp Steel Europe AG | 953 |
2 |
| Voestalpine Stahl GmbH | 340 |
2 |
| Tecniforja - Forjagem e Estampagem de Peças Técnicas, Lda | 3 |
2 |
| NIPPON STEEL Stainless Steel Corporation | 280 |
2 |
| Jiangsu Shagang Group Co., Ltd. | 67 |
2 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 43 |
2 |
| Daye Special Steel Co., Ltd. | 17 |
2 |
| Siemens AG | 24575 |
1 |
| GM Global Technology Operations LLC | 14181 |
1 |
| Caterpillar Inc. | 9149 |
1 |
| Other owners | 45 |