- 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: 453
10-year publication summary
|
20
|
43
|
36
|
31
|
23
|
28
|
34
|
37
|
27
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7349 |
77 |
| ArcelorMittal | 2526 |
52 |
| Nippon Steel Corporation | 6692 |
34 |
| ThyssenKrupp Steel Europe AG | 984 |
19 |
| NTN Corporation | 4933 |
14 |
| Nippon Steel & Sumitomo Metal Corporation | 1985 |
14 |
| Baoshan Iron & Steel Co., Ltd. | 1074 |
10 |
| ThyssenKrupp AG | 3458 |
10 |
| Robert Bosch GmbH | 43587 |
8 |
| Kanto Yakin Kogyo Co., Ltd. | 20 |
7 |
| PARKER NETSUSHORI KOGYO Co., Ltd. | 35 |
7 |
| POSCO Co., Ltd. | 1658 |
7 |
| Hitachi, Ltd. | 15895 |
6 |
| AK Steel Properties, Inc. | 75 |
6 |
| Honda Motor Co., Ltd. | 25871 |
5 |
| Dowa Thermotech Co., Ltd. | 53 |
5 |
| IHI Corporation | 3514 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2836 |
5 |
| Linde Aktiengesellschaft | 1435 |
5 |
| Salzgitter Flachstahl GmbH | 162 |
5 |
| Other owners | 152 |