Construction element
Patent 3980408 Issued on September 14, 1976. Estimated Expiration Date: 
September 14, 1993. 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 14, 1993. 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 2691538 3632147 3864051 InventorApplicationNo. 05/572712 filed on 04/29/1975US Classes:403/19, Tool-engaging or accommodating means or with tool403/171, Polyhedral403/362Including set screwExaminersPrimary: Kundrat, Andrew V.Attorney, Agent or FirmInternational ClassesE04B 1/19 (20060101)F16B 7/04 (20060101) Foreign Application Priority Data1975-04-30 DTAbstractConstruction element having a threaded portion for connection to a post and a spool-shaped portion for connection to a tube. | |
