Composite structure
Patent 4356678 Issued on November 2, 1982. Estimated Expiration Date: 
February 25, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 25, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsApplicationNo. 06/238259 filed on 02/25/1981US Classes:52/783.17, Corrugated intermediate sheet52/309.16, Embedded, elongated component52/600, Elongated reinforcing52/630IMPERFORATE PANEL WITH INTEGRAL REINFORCINGExaminersPrimary: Bell, J. KarlAttorney, Agent or FirmInternational ClassE04C 2/32 (20060101)AbstractA structural composite panel comprises a pair of filament-reinforced composite facing sheets and a ruffled, corrugated core secured between the facing sheets. The core has corrugations each with an axis having periodic oscillations in plane of the core and with the axis generally normal to filament direction.Other References
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