Roof structure
Patent 4856236 Issued on August 15, 1989. Estimated Expiration Date: 
January 12, 2008. 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.
January 12, 2008. 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 ReferencesInventorAssigneeApplicationNo. 07/143004 filed on 01/12/1988US Classes:52/11, COVER WITH SURFACE WATER RECEIVER AT EAVE OR VALLEY52/309.1, WITH SYNTHETIC RESINOUS COMPONENT52/518, LAPPED MULTIPLANAR SURFACING; E.G., SHINGLE TYPE52/527, Coplanar tab on margin52/57ROOF FINIAL OR CRESTINGExaminersPrimary: Murtagh, John E.Attorney, Agent or FirmInternational ClassesE04D 1/28 (20060101)E04D 13/10 (20060101) E04D 13/04 (20060101) E04D 3/35 (20060101) AbstractStructure for use on a roof consisting of a plurality of standard elements in the general form of planks that lock together which are formed with a dense outer impermeable skin and a lightweight insulating interior. | |
