Vinyl walkway paver
Patent 5409325 Issued on April 25, 1995. Estimated Expiration Date: 
February 10, 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.
February 10, 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 ReferencesGrid plate of plastic material Walk exercising floor Patent #: 5186703 InventorApplicationNo. 194586 filed on 02/10/1994US Classes:404/34, Modules or blocks (preformed)52/596, OPAQUE STONELIKE MODULE52/604, Particularly related to adjacent module404/41, Interfitting404/45ReinforcedExaminersPrimary: Britts, Ramon S.Assistant: O'Connor, Pamela A. Attorney, Agent or FirmForeign Patent References
International ClassE01C 005/20AbstractA vinyl walkway paver, particularly the one used as a paving stone with grass contained therein. The paver can be integrally formed to have a surface with a plurality of ridged bodies which are different in sizes. The center of the paver is a recessed portion, the four sides of the recessed portion form a hollow frame, the corners joining the diagonals of the frame are provided with corner holes and corner blocks. By such configuration, a plurality of pavers can be laid on the walkway, the central recessed portion thereof can be filled up with soil for planting grass. Moreover, the interior wall of the hollow frame can be provided with a plurality of ribs to form a suitable rough surface for strengthening the structure of the paver. Expansible materials such as polystyrene can also be filled inside the frame to give a better bonding structure.Field of SearchModules or blocks (preformed)Portable mat type With separate interlocking member Interfitting Patterned Composite or compound Reinforced Having integral key Key on angularly related edges or faces Key designed for four direction lock Keys, mortises, or key and mortise on opposed edges or faces Key designed for four direction lock With traversing passage Particularly related to adjacent module Grooves on juncture face | |
