- 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 11/00 - Process control or regulation for heat treatments
Patent holdings for IPC class C21D 11/00
Total number of patents in this class: 570
10-year publication summary
|
33
|
38
|
55
|
41
|
48
|
45
|
42
|
36
|
44
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6557 |
30 |
| ArcelorMittal | 2064 |
29 |
| SMS Group GmbH | 1080 |
25 |
| Nippon Steel Corporation | 6012 |
18 |
| Fives Stein | 99 |
16 |
| Baoshan Iron & Steel Co., Ltd. | 897 |
14 |
| Siemens AG | 24565 |
10 |
| NTN Corporation | 4976 |
8 |
| Kanto Yakin Kogyo Co., Ltd. | 20 |
8 |
| Novelis Inc. | 705 |
7 |
| Primetals Technologies Austria GmbH | 512 |
7 |
| Ebner Industrieofenbau GmbH | 139 |
6 |
| Primetals Technologies Germany GmbH | 194 |
6 |
| Nanjing Iron&Steel Co.,Ltd. | 153 |
6 |
| Wuhan Iron and Steel Company Limited | 26 |
6 |
| Ford Global Technologies, LLC | 20070 |
5 |
| California Institute of Technology | 3936 |
5 |
| Aktiebolaget SKF | 2839 |
5 |
| ALD Vacuum Technologies GmbH | 140 |
5 |
| Danieli & C. Officine Meccaniche S.p.A. | 705 |
5 |
| Other owners | 349 |