Patent US2517850A successfully refreshed from Google Patents.
US2517850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination airplane and wing unit for same
Assignee: Individual
•
Filing: 1948-11-08
•
Granted: 1950-08-08
•
Expires: 1968-11-08
Abstract
No abstract record available.
Inventors
- 👤 Dillavou Robert Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:43
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US798007A
Cited
US1209625A
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US1424491A
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US1743284A
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US1777992A
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FR678182A
Cited
US1753075A
Cited
US1781455A
Cited
US1813627A
Cited
US2141984A
Cited
US2426086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |