Brilliantized step cut stone with faceted crown
Patent 4118950 Issued on October 10, 1978. Estimated Expiration Date: 
February 4, 1997. 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 4, 1997. 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 138314 270018 3394692 InventorApplicationNo. 05/765834 filed on 02/04/1977US Classes:63/32GEMExaminersPrimary: Shay, F. BarryAttorney, Agent or FirmInternational ClassA44C 17/00 (20060101)AbstractA brilliantized step cut diamond has a straight edged polygonal shaped girdle with side and corner facets, a crown with a table and a table-and-girdle breaks which are faceted; and a pyramidal base having a point culet, a culet break and a girdle break with ridges extending from the culet to the corner of the girdle. A fan with three pairs of triangular halves is disposed symmetrically about each ridge with a triangular facet in each corner of the base having an edge which is colinear with the edge of a corner facet and an apex at a ridge. | |
