- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01K - Steam engine plantssteam accumulatorsengine plants not otherwise provided forengines using special working fluids or cycles
- F01K 21/04 - Steam engine plants not otherwise provided for using mixtures of steam and gasPlants generating or heating steam by bringing water or steam into direct contact with hot gas
Patent holdings for IPC class F01K 21/04
Total number of patents in this class: 133
10-year publication summary
|
12
|
18
|
12
|
6
|
10
|
6
|
13
|
2
|
9
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24505 |
4 |
| Finno Energy Oy | 14 |
4 |
| FuelCell Energy, Inc. | 329 |
3 |
| Hieta Technologies Limited | 26 |
3 |
| I.v.a.r. S.p.A. | 74 |
3 |
| Technion Research & Development Foundation Ltd. | 1217 |
3 |
| Gas Expansion Motors Limited | 7 |
3 |
| Mitsubishi Power, Ltd. | 1760 |
3 |
| Powerphase International, LLC | 40 |
3 |
| Rtx Corporation | 9360 |
3 |
| General Electric Company | 13767 |
2 |
| Alstom Technology Ltd | 1108 |
2 |
| Kawasaki Heavy Industries, Limited | 1628 |
2 |
| 8 Rivers Capital, LLC | 253 |
2 |
| Averill Partners, LLC | 6 |
2 |
| Doosan Heavy Industries & Construction Co., Ltd. | 581 |
2 |
| Energy Recovery, Inc. | 176 |
2 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3976 |
2 |
| Saab AB | 809 |
2 |
| GE Infrastructure Technology, LLC | 6213 |
2 |
| Other owners | 81 |