Precast concrete wingwall
Patent 5536113 Issued on July 16, 1996. Estimated Expiration Date: 
May 16, 2014. 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 16, 2014. 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 1778574 2413867 3779021 Retaining block Precast concrete culvert system Patent #: 4993872 InventorAssigneeApplicationNo. 243246 filed on 05/16/1994US Classes:405/125, Terminal or head405/286ConcreteExaminersPrimary: Novosad, Stephen J.Attorney, Agent or FirmInternational ClassesE02D 005/20E01F 005/00 AbstractA precast concrete soil retaining structure is provided comprising an upright portion, a base portion, and a plurality of retaining caps. Preferably its use will be as a wingwall for use with culvert systems. The upright portion of the structure has a first face and a second face, as well as a first end and a second end. The first end is of a height greater than or equal to the height of the second end. The base portion has a top surface and a bottom surface and a plurality of channels of a first diameter, each of which extends between the top surface and the bottom surface. Each of the retaining caps has a channel of a second diameter extending therethrough, with the second diameter preferably being less than that of the first diameter. Each of the retaining caps is positioned above a respective one of the base portion channels. | |
