Wide expansion joint system
Patent 5197250 Issued on March 30, 1993. Estimated Expiration Date: 
May 12, 2012. 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.
May 12, 2012. 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 3165987 3722379 3797188 Roadway expansion joint Protective shoulder structure for roadway joints Joint for use in concrete deposit Expansion joint system Expansion joint Traffic bearing expansion joint cover and method of preparing same Patent #: 4784516 InventorAssigneeApplicationNo. 881901 filed on 05/12/1992US Classes:52/396.04, Exposed separator between (1) set or cured concrete, (2) metal, wood, plastic, etc., or (3) prefabricated components404/65, Externally profiled404/67, Compound or composite404/69Sealing cap or filler supportExaminersPrimary: Scherbel, David A.Assistant: Caufield, Robert J. Attorney, Agent or FirmInternational ClassE01C 011/10AbstractAn expansion joint sytem (10) spans a slot (12) of adjacent concrete slabs (14, 16). The system includes a boxed out area (22) adjacent the slot. A plate member (32) extends across the slot. A preformed resilient pad (42) is positioned above the plate member. Nosings (64) of resilient material are bonded to the pad and to the surfaces bounding the boxed out area. The pad has a cross sectional configuration that achieves enhanced bonding to the nosings, greater flexibility and resistance to failure in cold weather, and greater elongation without failure.Other References
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