- 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 1/76 - Adjusting the composition of the atmosphere
Patent holdings for IPC class C21D 1/76
Total number of patents in this class: 439
10-year publication summary
|
34
|
20
|
43
|
36
|
31
|
23
|
27
|
32
|
34
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6853 |
74 |
| ArcelorMittal | 2292 |
51 |
| Nippon Steel Corporation | 6271 |
33 |
| NTN Corporation | 4975 |
16 |
| ThyssenKrupp Steel Europe AG | 956 |
16 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
14 |
| ThyssenKrupp AG | 3290 |
10 |
| Baoshan Iron & Steel Co., Ltd. | 963 |
8 |
| Robert Bosch GmbH | 42677 |
7 |
| Kanto Yakin Kogyo Co., Ltd. | 20 |
7 |
| PARKER NETSUSHORI KOGYO Co., Ltd. | 35 |
7 |
| Hitachi, Ltd. | 15499 |
6 |
| AK Steel Properties, Inc. | 75 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2871 |
6 |
| POSCO Co., Ltd. | 1567 |
6 |
| Honda Motor Co., Ltd. | 25301 |
5 |
| Dowa Thermotech Co., Ltd. | 44 |
5 |
| IHI Corporation | 3440 |
5 |
| Linde Aktiengesellschaft | 1498 |
5 |
| Salzgitter Flachstahl GmbH | 159 |
5 |
| Other owners | 147 |