Step-cut stone which has been brilliantized
Patent 4555916 Issued on December 3, 1985. Estimated Expiration Date: 
December 3, 2002. 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.
December 3, 2002. 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 ReferencesBrilliantized step cut diamond Patent #: 4020649 InventorApplicationNo. 06/400088 filed on 07/20/1982US Classes:63/32GEMExaminersPrimary: Shay, F. BarryAttorney, Agent or FirmInternational ClassA44C 17/00 (20060101)AbstractA step-cut stone with a straight edged polygonal shaped girdle comprising: a generally pyramidal base which is provided with kite-shaped facets extending from the culet toward the vertices of the girdle and ridges along lines between the culet and the middle of edges of the girdle; and a crown with at least girdle and table breaks wherein at least one of these breaks is cut with triangular shaped facets.Other References
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