Patent US5159318A successfully refreshed from Google Patents.
US3136501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft wing construction
Assignee: Individual
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Filing: 1961-10-23
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Granted: 1964-06-09
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:57
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/38; B64C3/44; B64C3/46; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN EXPANSIBLE WING STRUCTURE FOR AIRCRAFT COMPRISING A RIGID WING EXTENDING GENERALLY HORIZONTALLY AND HAVING A CONVENTIONAL AIRFOIL-SHAPED CROSS-SECTION, MEANS CARRIED BY THE UPPER SURFACE OF SAID WING AND EXTENDING LONGITUDINALLY THEREOF FOR SELECTIVELY INCREASING THE CAMBER AND DRAG CHARACTERISTICS OF SAID WING WITHOUT CHANGING THE BASIC CROSS-SECTIONAL SHAPE THEREOF, SAID MEANS COMPRISING A FLEXIBLE MEMBRANCE SECURED TO THE UPPER SURFACE OF THE WING AND EXTENDING LONGITUDINALLY THEREOF ALONG THE THICKEST PORTION OF THE WING AND BEING OF A WIDTH SOMEWHAT LESS THAN ONE-THIRD THE LENGTH OF THE
Claim 2
Dependent Claim
88 words
AN EXPANSIBLE WING STRUCTURE FOR AIRCRAFT COMPRISING A RIGID WING EXTENDING GENERALLY HORIZONTALLY AND HAVING A CONVENTIONAL AIRFOIL-SHAPED CROSS-SECTION, MEANS CARRIED BY THE UPPER SURFACE OF SAID WING AND EXTENDING LONGITUDINALLY THEREOF FOR SELECTIVELY INCREASING THE CAMBER AND DRAG CHARACTERISTICS OF SAID WING WITHOUT CHANGING THE BASIC CROSS-SECTIONAL SHAPE THEREOF, SAID MEANS COMPRISING A FLEXIBLE MEMBRANCE SECURED TO THE UPPER SURFACE OF THE WING AND EXTENDING LONGITUDINALLY THEREOF ALONG THE THICKEST PORTION OF THE WING AND BEING OF A WIDTH SOMEWHAT LESS THAN ONE-THIRD THE LENGTH OF THE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |