- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 7/12 - Opening or sealing the tap holes
Patent holdings for IPC class C21B 7/12
Total number of patents in this class: 72
10-year publication summary
|
4
|
7
|
7
|
5
|
4
|
1
|
7
|
3
|
3
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TMT - Tapping Measuring Technology SARL | 32 |
14 |
| TMT Tapping-Measuring-Technology GmbH | 13 |
6 |
| Tata Steel Limited | 174 |
4 |
| JFE Steel Corporation | 6965 |
3 |
| Refractory Intellectual Property GmbH & Co. KG | 542 |
3 |
| Trytec Co., Ltd. | 17 |
3 |
| ArcelorMittal | 2328 |
2 |
| Krosakiharima Corporation | 288 |
2 |
| Nippon Steel Corporation | 6365 |
2 |
| POSCO | 2181 |
2 |
| Shinagawa Refractories Co., Ltd. | 53 |
2 |
| Tmt-bbg Research and Development GmbH | 4 |
2 |
| Harbisonwalker International Holdings, Inc. | 52 |
2 |
| BBC Co., Ltd. | 17 |
1 |
| Berry Metal Company | 52 |
1 |
| Colas | 160 |
1 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 625 |
1 |
| Gillespie + Powers, Inc. | 6 |
1 |
| Harrison Steel Castings Company | 2 |
1 |
| JFE Chemical Corporation | 121 |
1 |
| Other owners | 18 |