Patent US4653499A successfully refreshed from Google Patents.
Patent US2532755A successfully refreshed from Google Patents.
US2532755A
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US
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Aircraft propeller drive
Assignee: Lockheed Martin Corp
•
Filing: 1946-02-21
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Granted: 1950-12-05
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Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 John J Bloomfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; B; B64; B64D; B64D35/00; F16D3/60; F16D3/62; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/455; Y10T403/457; Y10T403/458; Y10T403/54; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7054; Y10T403/7056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1180347A
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US1386493A
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US1414241A
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US1763409A
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US1947052A
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US2305454A
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US2326104A
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US2367190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |