US3270988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Minimum induced drag airfoil body
Assignee: Individual
•
Filing: 1962-12-26
•
Granted: 1966-09-06
•
Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence D Cone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/06; B64C23/065; B64C23/069; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IMPROVED MEANS FOR REDUCING THE INDUCED-DRAG OF A CONVENTIONAL WING CONFIGURATION WITHOUT EXCESSIVELY INCREASING WING SURFACE AREAS COMPRISING: A WING SEMISPAN OF SUBSTANTIAL PLANAR CONFIGURATION; AND AN UNCONVENTIONAL SPLIT WING TIP CONFIGURATION HAGING A PLURALITY OF SEPARATE WINGLETS WITHH DIFFERENT RADII OF CURVATURE INTERALLY FORMED WITH THE WING SEMISPAN AND COLLECTIVELY POSITIONED VERTICALLY IN A PLANE NORMAL TO THE FREESTREAM VELOCITY AND DISPOSED IN THE PLANE CONTAINING THE WING SPAN TO INSURE REDUCED INDUCED DRAG.
Claim 2
Dependent Claim
75 words
IMPROVED MEANS FOR REDUCING THE INDUCED-DRAG OF A CONVENTIONAL WING CONFIGURATION WITHOUT EXCESSIVELY INCREASING WING SURFACE AREAS COMPRISING: A WING SEMISPAN OF SUBSTANTIAL PLANAR CONFIGURATION; AND AN UNCONVENTIONAL SPLIT WING TIP CONFIGURATION HAGING A PLURALITY OF SEPARATE WINGLETS WITHH DIFFERENT RADII OF CURVATURE INTERALLY FORMED WITH THE WING SEMISPAN AND COLLECTIVELY POSITIONED VERTICALLY IN A PLANE NORMAL TO THE FREESTREAM VELOCITY AND DISPOSED IN THE PLANE CONTAINING THE WING SPAN TO INSURE REDUCED INDUCED DRAG.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |