Elevator panel
Patent 4414257 Issued on November 8, 1983. Estimated Expiration Date: 
July 9, 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.
July 9, 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. 06/281626 filed on 07/09/1981US Classes:428/182, Parallel corrugations428/594, Plural layers discontinuously bonded (e.g., spot-weld, mechanical fastener, etc.)52/783.19Corrugated sheet and flat sheet juxtaposedExaminersPrimary: Rutledge, L. DewayneAssistant: Limmerman, J. J. Attorney, Agent or FirmInternational ClassesB32B 3/28 (20060101)B66B 11/02 (20060101) AbstractA panel for an elevator composed of a surface plate and a corrugated reinforcing member having ridges facing the surface plate with the surface plate and the corrugated reinforcing member being joined to each other by a room temperature curing modified acrylate adhesive of a two-part non-solvent type applied in flat layers in an unmixed condition to the entire crest of the ridges and surface portions of the surface plate facing the ridges. The elevator panel thus formed retains the adhesive in a satisfactorily cured condition with a high level of adhesive strength while providing a greatly improved level of soundproofing and damping as well as ease of fabrication.Other References
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