Embeddable paving block intended for the surfacing of roadways and other areas of ground and the roadways or other areas of ground which are surfaced with such paving blocks
Patent 5251997 Issued on October 12, 1993. Estimated Expiration Date: 
November 14, 2011. 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.
November 14, 2011. 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 4030729 Stone tiles Block-formed revetment system for controlling soil erosion Reversible mat Guttered paving blocks Paving block Method and article of manufacture for removable pavement for underground utility placement Interconnecting paving stones Patent #: 5133620 InventorApplicationNo. 792282 filed on 11/14/1991US Classes:404/29, Blocks404/34, Modules or blocks (preformed)404/42PatternedExaminersPrimary: Dorner, Kenneth J.Assistant: Connolly, Nancy P. Attorney, Agent or FirmInternational ClassE01C 005/00Foreign Application Priority Data1990-11-16 BEAbstractThe embeddable paving block intended for surfacing roadways and other areas of ground, of the type including four identical arms disposed at right-angles to one another, each of the arms having shoulders distributed over the lateral faces and the ends of each of these arms, the shoulders being disposed to overlap in the plane of the surfacing the corresponding shoulders on the adjacent blocks in order to prevent the plane from opening up under the effect of any traction and in order to ensure a constant thickness of the joints. | |
