US2515587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane with circular airfoil
Assignee: Individual
•
Filing: 1946-08-19
•
Granted: 1950-07-18
•
Expires: 1966-08-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Blondin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:46
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848578A
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US966151A
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US935862A
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US983750A
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US983868A
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US1115041A
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US1335690A
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US1806148A
Cited
US1681761A
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US1755828A
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US1804588A
Cited
US1836896A
Cited
US1864964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |