Building roofing structure
Patent 4100708 Issued on July 18, 1978. Estimated Expiration Date: 
January 10, 1997. 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 10, 1997. 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 793358 2183451 2704522 2809074 2939554 3091313 3398498 3461636 3643391 Self-supporting element for roof structures and combinations thereof Patent #: 3978635 Inventors
ApplicationNo. 05/757973 filed on 01/10/1977US Classes:52/222, TENSIONED OR FLEXED SHEET FACING52/644, Arcuate chord52/650.3, Openwork deck, walkway, ceiling, etc.52/654.1, Parallel trellises or sheets held by disparate connector52/691, Truss with inclined lower chord52/693, Diagonal bracing52/745.08Using prefabricated unitExaminersPrimary: Braun, Leslie A.Attorney, Agent or FirmInternational ClassesE04B 7/12 (20060101)E04B 7/08 (20060101) AbstractA characteristic feature of the present invention lies in that in the building roofing structure is made of a number of similar elements in the form of an arch and a tie beam. The tie beam of each arch is made of at least one panel with a framework comprising longitudinal chords and cross-pieces and of a prestressed sheet covering connected to the framework. | |
