- 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 1/02 - Feed-water heaters, e.g. preheaters with water tubes arranged in the boiler furnace, fire tubes or flue ways
Patent holdings for IPC class F22D 1/02
Total number of patents in this class: 71
10-year publication summary
|
10
|
5
|
4
|
3
|
1
|
2
|
3
|
5
|
5
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Heavy Industries, Ltd. | 8871 |
10 |
| Nooter/eriksen, Inc. | 68 |
4 |
| General Electric Technology GmbH | 1371 |
3 |
| Siemens Energy Global GmbH & Co. KG | 3059 |
3 |
| Siemens AG | 24337 |
2 |
| Alberta-Pacific Forest Industries Inc. | 12 |
2 |
| Electric Power Development Co., Ltd. | 72 |
2 |
| Fccl Partnership | 38 |
2 |
| IHI Corporation | 3467 |
2 |
| Maxi-therme Inc. | 15 |
2 |
| Miura Co., Ltd. | 292 |
2 |
| Skavis Corporation | 12 |
2 |
| Hokuetsu Corporation | 65 |
2 |
| Mitsubishi Power, Ltd. | 1810 |
2 |
| Hitachi, Ltd. | 15679 |
1 |
| Siemens Energy, Inc. | 1703 |
1 |
| AMEC Foster Wheeler Energia Oy | 23 |
1 |
| Cockerill Maintenance & Ingenierie SA | 80 |
1 |
| Doosan Power Systems Limited | 19 |
1 |
| Hitachi Zosen Corporation | 614 |
1 |
| Other owners | 25 |