- 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: 73
10-year publication summary
|
6
|
10
|
7
|
5
|
6
|
1
|
8
|
4
|
3
|
2
|
| 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 | 35 |
15 |
| TMT Tapping-Measuring-Technology GmbH | 13 |
6 |
| Tata Steel Limited | 191 |
5 |
| JFE Steel Corporation | 6607 |
3 |
| Refractory Intellectual Property GmbH & Co. KG | 528 |
3 |
| Shinagawa Refractories Co., Ltd. | 54 |
3 |
| Trytec Co., Ltd. | 16 |
3 |
| ArcelorMittal | 2087 |
2 |
| Krosakiharima Corporation | 268 |
2 |
| Nippon Steel Corporation | 6044 |
2 |
| Paul Wurth S.A. | 409 |
2 |
| POSCO | 2204 |
2 |
| Tmt-bbg Research and Development GmbH | 4 |
2 |
| Advanced Metals Technology Company, LLC | 1 |
1 |
| BBC Co., Ltd. | 17 |
1 |
| Berry Metal Company | 52 |
1 |
| Colas | 162 |
1 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 648 |
1 |
| Gillespie + Powers, Inc. | 6 |
1 |
| Harrison Steel Castings Company | 2 |
1 |
| Other owners | 16 |