Moisture vapor transmitting film of polyurethane blended with an incompatible polymer
Patent 4452845 Issued on June 5, 1984. Estimated Expiration Date: 
July 12, 2003. 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 12, 2003. 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 References 3426754 3536638 3646178 3844865 3870593 Air permeable waterproof products having fabric-like aesthetic properties and methods for making the same Curing liquid polyurethane prepolymers Coatings for fibrous sheet material of polyurethane and oil-like hydrocarbon polymer Polymer fabric Patent #: 4133310 InventorsAssigneeApplicationNo. 06/512961 filed on 07/12/1983US Classes:602/52, Thin polymeric film or adhesive428/315.7, Specified thickness of void-containing component (absolute or relative) or numerical cell dimension428/317.3, As outermost component428/317.7, Composition of adhesive or bonding component specified428/338, Monolayer with structurally defined element428/343Adhesive outermost layerExaminersPrimary: Van Balen, William J.Attorney, Agent or FirmInternational ClassesA61L 15/16 (20060101)A61L 15/22 (20060101) C08L 75/00 (20060101) C08L 75/04 (20060101) Foreign Application Priority Data1980-08-13 GBAbstractA moisture vapor transmitting film comprising a blend of polyurethane and an incompatible polymer characterized in that the incompatible polymer forms a discrete phase within a continuous matrix of polyurethane and that said film contains voids and processes for the manufacture thereof. | |
