Frangible interlocking paving stone
Patent 5496129 Issued on March 5, 1996. Estimated Expiration Date: 
August 6, 2013. 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.
August 6, 2013. 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 ReferencesInventorApplicationNo. 103433 filed on 08/06/1993US Classes:404/29, Blocks52/311.2, Elements interfit or abut to create design52/603, With integral spacing projections52/610, L-shaped404/34, Modules or blocks (preformed)404/42PatternedExaminersPrimary: Britts, Ramon S.Assistant: O'Connor, Pamela A. Attorney, Agent or FirmForeign Patent References
International ClassE01C 005/00AbstractA paving stone (10) is provided which includes individual sectors (20, 30) of uniform size and shape. Each sector (20, 30) is joined together to form a unique pattern such as a cross-paver (10), a Z-paver (110) or an S-paver (210). Some sectors (20, 30) are tips sectors (20) which attach to only one other central sector (30) and some sectors (20, 30) are central sectors (30) which attach to two or more other top sectors (20). Each of the sectors (20, 30) extend between a common top surface (40) and a bottom surface (50). An outside surface (60) defines a periphery of the paving stone. A V-groove (80) is positioned on the top surface (40) at margins between adjacent sectors (20, 30). The V-groove (80) includes a crease (82) on a bottom thereof which encourages vertical crack propagation from the top surface (40) through to the bottom surface (50) in a plane when a appropriate force-applying tool is utilized. When this occurs the paver (10) is modified into a paver of a different shape. Spacers (66) on the outside surface (60) of the paver (10) provide interstices (90) between adjacent pavers (10).Other References
Field of SearchModules or blocks (preformed)Including spacer means Integral Bevel or incline edge With separate interlocking member Interfitting Patterned Composite or compound With integral spacing projections Nonrectangular cross-section Faces with offset edges L-shaped T-shaped ORNAMENTAL: COLOR, THICKNESS VARIATION, OR DISSIMILAR ELEMENTS FORMING PATTERN Elements interfit or abut to create design Facer formed to simulate multiple units Removable corner or internal section | |
