US2561090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power plant, including normally contrarotating turbine elements for driving a load shaft and means for rotating said elements in the same direction when the turbine is idling
Assignee: Metropolitan Vickers Electrical Co Ltd
•
Filing: 1944-05-01
•
Granted: 1951-07-17
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Baumann Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313058A
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US1108422A
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FR753517A
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US2149785A
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US2309559A
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US2318990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |