- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F22D - Preheating, or accumulating preheated, feed-water for steam generationfeed-water supply for steam generationcontrolling water level for steam generationauxiliary devices for promoting water circulation within steam boilers
- F22D 1/38 - Constructional features of water and air preheating systems
Patent holdings for IPC class F22D 1/38
Total number of patents in this class: 13
10-year publication summary
|
3
|
0
|
1
|
0
|
0
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0
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0
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0
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Miura Co., Ltd. | 286 |
4 |
| Electric Power Development Co., Ltd. | 73 |
2 |
| Huaneng Clean Energy Research Institute | 420 |
2 |
| Skavis Corporation | 12 |
2 |
| Praxair Technology, Inc. | 1311 |
1 |
| Suncue Company Ltd. | 10 |
1 |
| AF-Consult Oy | 3 |
1 |
| Other owners | 0 |