Interlocking ground slab element and method
Patent 5186574 Issued on February 16, 1993. Estimated Expiration Date: 
February 10, 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.
February 10, 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 244594 722580 1314586 2600090 2888779 Interlocking slab element for covering the ground and the like Patent #: 4544305 InventorApplicationNo. 833364 filed on 02/10/1992US Classes:404/73, Handling or treating preformed modular unit404/41, Interfitting404/42PatternedExaminersPrimary: Novosad, Stephen J.Attorney, Agent or FirmForeign Patent References
International ClassesE01C 005/02E01C 005/04 E01C 005/06 AbstractA slab element for covering a ground surface and the like, the linear, curvilinear, and circular-design surfaces produced by the slab elements, and a method of forming the design surfaces. The slab element comprises a rectangular slab element having a convex and a concave end adapted to interlock and be rotatable, with grout material therebetween, and the peripheral sides of the slab element entirely curvilinear. | |
