US3500020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Minimum induced drag airfoil body
Assignee: National Aeronautics and Space Administration
•
Filing: 1965-09-30
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Granted: 1970-03-10
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Expires: 1985-09-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence D Cone Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/32; G06G7/38; G06G7/40; G06G7/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3128371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |