- 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 1/74 - 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: 469
10-year publication summary
|
52
|
22
|
24
|
35
|
22
|
22
|
33
|
35
|
48
|
36
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7074 |
68 |
| ArcelorMittal | 2402 |
28 |
| Nippon Steel Corporation | 6514 |
26 |
| POSCO Co., Ltd. | 1601 |
18 |
| Baoshan Iron & Steel Co., Ltd. | 997 |
14 |
| NTN Corporation | 4964 |
9 |
| MM Metals USA, LLC | 13 |
8 |
| ThyssenKrupp Steel Europe AG | 962 |
7 |
| Robert Bosch GmbH | 43096 |
6 |
| IHI Corporation | 3471 |
6 |
| Kanto Yakin Kogyo Co., Ltd. | 20 |
6 |
| Wisdri Engineering & Research Incorporation Limited | 212 |
6 |
| Chugai Ro Co., Ltd. | 128 |
5 |
| Ipsen, Inc. | 27 |
5 |
| Swagelok Company | 319 |
5 |
| Toyota Motor Corporation | 33519 |
4 |
| Andritz Technology and Asset Management GmbH | 89 |
4 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
4 |
| Fives Stein | 105 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
| Other owners | 232 |