Patent US4619518A successfully refreshed from Google Patents.
Patent US2526409A successfully refreshed from Google Patents.
US2526409A
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Turbo-propeller type power plant having radial flow exhaust turbine means
Assignee: Lockheed Martin Corp
•
Filing: 1945-01-09
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Granted: 1950-10-17
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Expires: 1965-01-09
Abstract
No abstract record available.
Inventors
- 👤 Nathan C Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:50
CPC Classifications
F; F02; F02K; F02K3/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1017564A
Cited
US1371444A
Cited
US1766886A
Cited
GB372377A
Cited
US2066452A
Cited
US1959795A
Cited
US2050349A
Cited
US2082397A
Cited
FR792405A
Cited
US2280835A
Cited
US2243467A
Cited
US2292288A
Cited
US2306953A
Cited
GB480236A
Cited
US2405919A
Cited
US2397999A
Cited
US2371889A
Cited
US2372686A
Cited
US2404767A
Cited
US2409446A
Cited
US2428830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |