Telescoping collapsible ladder
Patent 4002223 Issued on January 11, 1977. Estimated Expiration Date: 
January 11, 1994. 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 11, 1994. 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 3653463 3858683 InventorAssigneeApplicationNo. 677044 filed on 04/14/1976US Classes:182/156, Collapsible ladder182/206, With hook or grab182/228.1RUNG OR RUNG-TO-STILE CONNECTIONExaminersPrimary: Machado, Reinaldo P.Attorney, Agent or FirmAbstractA ladder is disclosed which includes telescoping sections that collapse and extend for adjusting the length of the ladder. The ladder is particularly useful on boats and may have curved upper ends on its side members for hooking the ladder over the side of a boat. The curved ends are rotatable for collapsing them toward the major plane of the ladder. Rotatable stand-off legs are also provided. | |
