- 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: 539
10-year publication summary
|
29
|
30
|
37
|
33
|
23
|
40
|
36
|
54
|
32
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2725 |
47 |
| JFE Steel Corporation | 7617 |
45 |
| SMS Group GmbH | 1208 |
27 |
| SMS Siemag Aktiengesellschaft | 484 |
19 |
| Primetals Technologies Austria GmbH | 580 |
17 |
| Siemens VAI Metals Technologies GmbH | 203 |
16 |
| Refractory Intellectual Property GmbH & Co. KG | 568 |
13 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
11 |
| Paul Wurth S.A. | 430 |
10 |
| Tata Steel Limited | 165 |
10 |
| Berry Metal Company | 50 |
9 |
| Nippon Steel Corporation | 6969 |
9 |
| Metso Metals Oy | 225 |
9 |
| Praxair Technology, Inc. | 1214 |
8 |
| Danieli & C. Officine Meccaniche S.p.A. | 720 |
7 |
| Heraeus Electro-Nite International N.V. | 220 |
7 |
| BEDA Oxygentechnik Armaturen GmbH | 11 |
6 |
| Cisdi Engineering Co., Ltd. | 108 |
6 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 4132 |
6 |
| Technological Resources Pty. Limited | 441 |
6 |
| Other owners | 251 |