- 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: 458
10-year publication summary
|
20
|
43
|
36
|
31
|
24
|
28
|
34
|
39
|
29
|
9
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7549 |
79 |
| ArcelorMittal | 2680 |
55 |
| Nippon Steel Corporation | 6895 |
35 |
| ThyssenKrupp Steel Europe AG | 992 |
19 |
| NTN Corporation | 4915 |
14 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
14 |
| Baoshan Iron & Steel Co., Ltd. | 1104 |
10 |
| ThyssenKrupp AG | 3399 |
10 |
| Robert Bosch GmbH | 44176 |
8 |
| Kanto Yakin Kogyo Co., Ltd. | 20 |
7 |
| PARKER NETSUSHORI KOGYO Co., Ltd. | 36 |
7 |
| POSCO Co., Ltd. | 2015 |
7 |
| Hitachi, Ltd. | 16113 |
6 |
| AK Steel Properties, Inc. | 74 |
6 |
| Honda Motor Co., Ltd. | 26034 |
5 |
| Dowa Thermotech Co., Ltd. | 53 |
5 |
| IHI Corporation | 3535 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
5 |
| Linde Aktiengesellschaft | 1421 |
5 |
| Salzgitter Flachstahl GmbH | 163 |
5 |
| Other owners | 151 |