Laminate structure with improved acoustical absorption
Patent 4557970 Issued on December 10, 1985. Estimated Expiration Date: 
September 4, 2004. 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.
September 4, 2004. 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. 06/647311 filed on 09/04/1984US Classes:428/316.6, Plural void-containing components428/317.1, With component specified as adhesive or bonding agent428/318.4With nonvoid component of specified compositionExaminersPrimary: Van Balen, William J.Attorney, Agent or FirmInternational ClassesB32B 5/22 (20060101)B32B 5/32 (20060101) B32B 27/12 (20060101) G10K 11/168 (20060101) G10K 11/00 (20060101) AbstractA laminate structure with improved acoustical absorption is provided which has a first and a third layer of foamed thermoplastic material and a second layer, intermediate the first and third layers, which is a material having acoustical properties different from the properties of the material of the first and third layers. A portion of the surface area of each layer is adhesively bonded to the adjacent layer. A sheet of paper or fabric is adhesively bonded to at least the outer surfaces of the first and third layers. | |
