US2639583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contrarotating gas turbine having a power turbine and a plurality of compressor-turbines in series
Assignee: Individual
•
Filing: 1947-06-25
•
Granted: 1953-05-26
•
Expires: 1967-06-25
Abstract
No abstract record available.
Inventors
- 👤 Harry C Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/04; F02C3/06; F02C3/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2505660A
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US1288360A
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US2188546A
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US2413225A
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US2409177A
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US2426098A
Cited
US2430398A
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US2428330A
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US2441488A
Cited
US2454738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |