Set of paving stones
Patent 6168347 Issued on January 2, 2001. Estimated Expiration Date: 
March 1, 2019. 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.
March 1, 2019. 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 D159255 708470 847471 889692 2323848 Paving stone construction set Patent #: 5533827 InventorsAssigneeApplicationNo. 259674 filed on 03/01/1999US Classes:404/34, Modules or blocks (preformed)404/42PatternedExaminersPrimary: Lillis, Eileen D.Assistant: Hartmann, Gary S. Attorney, Agent or FirmForeign Patent References
International ClassC01C 005/06Foreign Application Priority Data1998-02-27 CAAbstractA set of paving blocks wherein each block is a prism having side and end walls that are irregular in outline but are contained only within a respective virtual rectangular perimeter. The rectangular perimeter has a length L in a X axis and a width W in a Y axis at right angle to the X axis. At least two spaced apart parallel sections of the prism extend between the side walls, parallel to the Y axis and terminate at the virtual rectangular perimeter, such that each section has a width equal to W and the prism has at least one section bisecting the virtual rectangle parallel to the X axis and terminating at a rectangular perimeter and having a length equal to L. | |
