- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F22B - Methods of steam generation; steam boilers
- F22B 21/20 - Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially-straight water tubes involving sectional or subdivided headers in separate arrangement for each water-tube set
Patent holdings for IPC class F22B 21/20
Total number of patents in this class: 5
10-year publication summary
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1
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0
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0
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0
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0
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1
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0
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0
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1
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0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24990 |
1 |
| AMEC Foster Wheeler Energia Oy | 23 |
1 |
| The Babcock & Wilcox Company | 184 |
1 |
| Foster Wheeler Energia Oy | 53 |
1 |
| NEM Energy B.V. | 17 |
1 |
| Other owners | 0 |