- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F22B - Methods of steam generationsteam boilers
- F22B 21/28 - Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent spirally
Patent holdings for IPC class F22B 21/28
Total number of patents in this class: 5
10-year publication summary
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24561 |
1 |
| Del Nova VIS S.r.l | 7 |
1 |
| Palms Institute Pty Ltd | 1 |
1 |
| RD Estate GmbH & Co. KG | 9 |
1 |
| Newcleo SA | 11 |
1 |
| Other owners | 0 |