US2468787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerodynamic impelling device
Assignee: Individual
•
Filing: 1943-09-09
•
Granted: 1949-05-03
•
Expires: 1963-09-09
Abstract
No abstract record available.
Inventors
- 👤 Catherine D Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C39/062; B64C39/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB129142A
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US1589780A
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US1496733A
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US1854043A
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US1724226A
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US1786017A
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US1887148A
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GB383408A
Cited
US2008464A
Cited
US2280835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |