US3039719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical take-off airplane
Assignee: Individual
•
Filing: 1956-11-16
•
Granted: 1962-06-19
•
Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Haviland H Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:05
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1786545A
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US1788836A
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US1788218A
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US1845307A
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GB437447A
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US1951817A
Cited
FR793426A
Cited
US2252284A
Cited
US2630986A
Cited
US2702168A
Cited
US2708081A
Cited
US2853256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |