- All sections
- C - Chemistry; metallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steel; treatment in molten state of ferrous alloys
- C21C 5/46 - Constructional features of converters - Details or accessories
Patent holdings for IPC class C21C 5/46
Total number of patents in this class: 482
10-year publication summary
|
32
|
38
|
29
|
30
|
37
|
33
|
23
|
39
|
33
|
21
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
38 |
| SMS Group GmbH | 1029 |
27 |
| SMS Siemag Aktiengesellschaft | 529 |
22 |
| ArcelorMittal | 1887 |
19 |
| Siemens VAI Metals Technologies GmbH | 233 |
17 |
| Primetals Technologies Austria GmbH | 479 |
15 |
| Tata Steel Limited | 184 |
15 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
11 |
| Technological Resources Pty. Limited | 444 |
11 |
| Refractory Intellectual Property GmbH & Co. KG | 502 |
10 |
| Metso Metals Oy | 205 |
10 |
| Berry Metal Company | 52 |
9 |
| Nippon Steel Corporation | 5649 |
9 |
| Paul Wurth S.A. | 392 |
9 |
| Heraeus Electro-Nite International N.V. | 211 |
7 |
| BEDA Oxygentechnik Armaturen GmbH | 11 |
6 |
| Danieli & C. Officine Meccaniche S.p.A. | 680 |
6 |
| Praxair Technology, Inc. | 1367 |
6 |
| TMT - Tapping Measuring Technology SARL | 29 |
6 |
| Cisdi Engineering Co., Ltd. | 86 |
5 |
| Other owners | 224 |