US3507463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thrust induced vortex lift arrangement for aircraft
Assignee: Individual
•
Filing: 1968-01-18
•
Granted: 1970-04-21
•
Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 William Donald Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:43
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
DE584585C
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US2041795A
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FR886889A
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US2585676A
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US2659552A
Cited
US2821351A
Cited
GB888168A
Cited
US3029044A
Cited
US3202383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |