US3674585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an aircraft wing structure
Assignee: Windecker Research Inc
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Filing: 1969-10-07
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Granted: 1972-07-04
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Expires: 1989-10-07
Abstract
Abstract A GENERALLY HOLLOW AIRCRAFT WING STRUCTURE IS PROVIDED, THE WALL OF WHICH INCLUDES AN OUTER SKIN, AN INTERMEDIATE LAYER INCLUDING FOAM MATERIAL, AND A STRENGTHENING LAYER OF GLASS FIBROUS MATERIAL IMPREGNATED WITH SYNTHETIC RESINOUS MATERIAL. A METHOD OF CONSTRUCTING THE WING STRUCTURE IS PROVIDED WHICH INCLUDES PROVIDING A SUITABLY SHAPED MOLD FOR HALF THE WING STRUCTURE, FORMING THE SKIN IN THE MOLD, BONDING FOAM STRIPS TO THE SKIN, AND THENCE BONDING TO THE FOAM STRIPS STRENGTHENING GLASS FIBROUS SHEETS.
Inventors
- 👤 Leo J Windecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:16
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; B29; B29D; B29D99/00; B29D99/001; B29D99/0021; B29D99/0025; B29D99/0028; B32B27/00; B32B27/06; B32B27/065; B64; B64C; B64C3/00; B32B2262/00; B32B2262/10; B32B2262/101; B32B2605/00; B32B2605/18
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |