- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F22B - Methods of steam generationsteam boilers
- F22B 31/08 - Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
Patent holdings for IPC class F22B 31/08
Total number of patents in this class: 56
10-year publication summary
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5
|
1
|
3
|
4
|
2
|
2
|
7
|
1
|
1
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| DRI-STEEM Corporation | 47 |
4 |
| Xi'an Thermal Power Research Institute Co., Ltd. | 357 |
4 |
| Castle European Limited | 7 |
3 |
| China Petroleum & Chemical Corporation | 1921 |
2 |
| Huaneng Clean Energy Research Institute | 470 |
2 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
2 |
| Shanghai Boiler Works Ltd | 26 |
2 |
| Shanghai Boiler Works Co., Ltd. | 26 |
2 |
| Mitsubishi Power, Ltd. | 1795 |
2 |
| Steam Injection Technology Service Center of Shenglioilfield Sinopec | 3 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 8823 |
1 |
| Air Products and Chemicals, Inc. | 1446 |
1 |
| Kawasaki Heavy Industries, Limited | 1636 |
1 |
| AMEC Foster Wheeler Energia Oy | 23 |
1 |
| Andritz Technology and Asset Management GmbH | 89 |
1 |
| Babcock & Wilcox Power Generation Group, Inc. | 33 |
1 |
| Exponential Technologies, Inc. | 36 |
1 |
| Foster Wheeler Energia Oy | 47 |
1 |
| Inventys Thermal Technologies Inc. | 28 |
1 |
| Korea East-West Power Co., Ltd. | 31 |
1 |
| Other owners | 21 |