- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01K - Steam engine plants; steam accumulators; engine plants not otherwise provided for; engines using special working fluids or cycles
- F01K 7/22 - Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
Patent holdings for IPC class F01K 7/22
Total number of patents in this class: 210
10-year publication summary
35
|
17
|
19
|
16
|
9
|
5
|
13
|
5
|
6
|
2
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Siemens AG | 24990 |
30 |
General Electric Technology GmbH | 1657 |
15 |
Mitsubishi Power, Ltd. | 1680 |
15 |
Siemens Energy Global GmbH & Co. KG | 2775 |
12 |
GE Infrastructure Technology, LLC | 5873 |
11 |
Doosan Heavy Industries & Construction Co., Ltd. | 604 |
9 |
Mitsubishi Hitachi Power Systems, Ltd. | 999 |
8 |
L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
7 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
6 |
General Electric Company | 18133 |
5 |
Toshiba Corporation | 12017 |
5 |
Alstom Technology Ltd | 1196 |
5 |
Electric Power Research Institute, Inc. | 223 |
3 |
Massachusetts Institute of Technology | 9795 |
2 |
Dow Global Technologies LLC | 10147 |
2 |
Air Products and Chemicals, Inc. | 1448 |
2 |
IFP Energies Nouvelles | 2717 |
2 |
Jinan University | 199 |
2 |
Sanden Corporation | 859 |
2 |
Turboden S.r.l. | 34 |
2 |
Other owners | 65 |