- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F27B - Furnaces, kilns, ovens or retorts in generalopen sintering or like apparatus
- F27B 3/02 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of single-chamber fixed-hearth type
Patent holdings for IPC class F27B 3/02
Total number of patents in this class: 21
10-year publication summary
|
6
|
1
|
2
|
1
|
1
|
1
|
3
|
1
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Elkem ASA | 206 |
3 |
| Tokyo Electron Limited | 12192 |
2 |
| Tata Steel Limited | 191 |
2 |
| Airgas, Inc. | 143 |
1 |
| Airgas USA, LLC | 6 |
1 |
| Eugene Technology Co., Ltd. | 170 |
1 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2906 |
1 |
| Osaka Gas Co., Ltd. | 322 |
1 |
| POSCO | 2204 |
1 |
| Pyrotek, Inc. | 193 |
1 |
| SMS Group GmbH | 1082 |
1 |
| SUSS MicroTec Lithography GmbH | 75 |
1 |
| Tata Steel Nederland Technology BV | 149 |
1 |
| Yanggu Xiangguang Copper Co., Ltd. | 9 |
1 |
| China ENFI Engineering Corp. | 99 |
1 |
| North American Construction Services, Ltd. | 2 |
1 |
| Leading Edge Equipment Technologies, Inc. | 12 |
1 |
| Other owners | 0 |