- All sections
- C - Chemistrymetallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steeltreatment in molten state of ferrous alloys
- C21C 5/46 - Details or accessories
Patent holdings for IPC class C21C 5/46
Total number of patents in this class: 512
10-year publication summary
|
38
|
29
|
30
|
37
|
33
|
23
|
40
|
36
|
52
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6794 |
43 |
| ArcelorMittal | 2248 |
28 |
| SMS Group GmbH | 1113 |
27 |
| SMS Siemag Aktiengesellschaft | 507 |
21 |
| Siemens VAI Metals Technologies GmbH | 223 |
17 |
| Primetals Technologies Austria GmbH | 525 |
16 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
11 |
| Tata Steel Limited | 175 |
11 |
| Paul Wurth S.A. | 416 |
10 |
| Refractory Intellectual Property GmbH & Co. KG | 538 |
10 |
| Berry Metal Company | 52 |
9 |
| Nippon Steel Corporation | 6181 |
9 |
| Metso Metals Oy | 197 |
9 |
| Technological Resources Pty. Limited | 451 |
8 |
| ArcelorMittal | 22 |
8 |
| Danieli & C. Officine Meccaniche S.p.A. | 710 |
7 |
| Heraeus Electro-Nite International N.V. | 202 |
7 |
| BEDA Oxygentechnik Armaturen GmbH | 11 |
6 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3937 |
6 |
| Praxair Technology, Inc. | 1311 |
6 |
| Other owners | 243 |