Concrete paving block
Patent 6055784 Issued on May 2, 2000. Estimated Expiration Date: 
April 18, 2017. 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.
April 18, 2017. 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 1089507 1694665 2181451 2207454 Set of paving stones, particularly set of concrete paving stones Compound pavement stone Modular tile flooring system Frangible interlocking paving stone Paving stone with lateral spacers Paving elements for the water-permeable reinforcement of surfaces Patent #: 5797698 InventorApplicationNo. 817540 filed on 04/18/1997US Classes:52/302.1, WALL, CEILING, FLOOR, OR ROOF DESIGNED FOR VENTILATION OR DRAINAGE52/592.1, Keys, mortises, or key and mortise on opposed edges or faces52/603, With integral spacing projections52/605, Grooves on juncture face404/36, Foraminous traffic surface404/38IntegralExaminersPrimary: Friedman, Carl D.Assistant: Tran, Phi Dieu Attorney, Agent or FirmForeign Patent References
International ClassE04B 005/48Foreign Application Priority Data1995-08-26 EPAbstractTo improve the flow-off of liquids from the laying pattern and mechanical laying in a concrete paving block, the ground area of the body (1) of the block has a rectangular shape formed by three squares (2, 3, 4) of equal size, the upright side surfaces of the body (1) extend evenly transversely to the ground area and each side surface of the body (1) has at least one projecting strip-like extension (5) which can be supported in the pattern with the formation of seams on adjacent bodies (1) and form interlocks or the like with extensions (5) of adjacent bodies (1).Field of SearchWith integral spacing projectionsL-shaped Dissimilar material edging Connecting protruding ends of units` reinforcement (e.g., rebar) Keys, mortises, or key and mortise on opposed faces or edges Integral edge engaging spacing feature on tile Composed of interfitting blocks Multiple, finite keys (e.g, perpendicular sawtooth) Keys, mortises, or key and mortise on opposed edges or faces Having mortise with internal space Particularly related to adjacent module Grooves on juncture face Modules or blocks (preformed) Including spacer means Integral Bevel or incline edge Interfitting Patterned Foraminous traffic surface | |
