- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F27B - Furnaces, kilns, ovens or retorts in generalopen sintering or like apparatus
- F27B 3/04 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-hearth typeHearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-chamber typeCombinations of hearth-type furnaces
Patent holdings for IPC class F27B 3/04
Total number of patents in this class: 130
10-year publication summary
|
6
|
7
|
7
|
2
|
14
|
6
|
8
|
10
|
14
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Molten Metal Equipment Innovations, LLC | 98 |
12 |
| Pyrotek, Inc. | 202 |
9 |
| Tounetsu Co., Ltd. | 28 |
6 |
| Nippon Crucible Co., Ltd. | 38 |
5 |
| Hydro Aluminium Rolled Products GmbH | 117 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
3 |
| LOI Thermprocess GmbH | 37 |
3 |
| Novelis Inc. | 744 |
3 |
| Illinois Tool Works Inc. | 11454 |
2 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10924 |
2 |
| Central Motor Wheel Co., Ltd. | 90 |
2 |
| Commonwealth Scientific and Industrial Research Organisation | 1655 |
2 |
| Daiki Engineering Co., Ltd. | 2 |
2 |
| Gautschi Engineering GmbH | 12 |
2 |
| Hyundai Steel Company | 426 |
2 |
| Sanken Sangyo Co., Ltd. | 7 |
2 |
| Shoei Mfg. Co., Ltd. | 4 |
2 |
| StrikoWestofen GmbH | 27 |
2 |
| Technological Resources Pty. Limited | 452 |
2 |
| China ENFI Engineering Corp. | 102 |
2 |
| Other owners | 62 |