- 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 1/74 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
Patent holdings for IPC class C21D 1/74
Total number of patents in this class: 406
10-year publication summary
|
21
|
52
|
23
|
24
|
39
|
22
|
27
|
31
|
35
|
22
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
60 |
| ArcelorMittal | 1887 |
24 |
| Nippon Steel Corporation | 5649 |
19 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
13 |
| POSCO Co., Ltd. | 1059 |
12 |
| NTN Corporation | 5008 |
9 |
| ThyssenKrupp Steel Europe AG | 924 |
7 |
| Toyota Motor Corporation | 28582 |
6 |
| IHI Corporation | 3268 |
6 |
| Robert Bosch GmbH | 40953 |
5 |
| Ipsen, Inc. | 27 |
5 |
| Kanto Yakin Kogyo Co., Ltd. | 16 |
5 |
| Swagelok Company | 325 |
5 |
| MM Metals USA, LLC | 10 |
5 |
| Andritz Technology and Asset Management GmbH | 89 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
| POSCO | 2222 |
4 |
| Salzgitter Flachstahl GmbH | 155 |
4 |
| Wisdri Engineering & Research Incorporation Limited | 132 |
4 |
| Other owners | 201 |