Cut diamond
Patent 5657647 Issued on August 19, 1997. Estimated Expiration Date: 
July 26, 2015. 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.
July 26, 2015. 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 D36103 D36104 2554901 2587972 3796065 3835665 Imitation gem Faceted gem cut from shallow gemstone material Method of cutting gemstones and product High brilliance step-cut stone and method of making same Patent #: 5186024 InventorApplicationNo. 506919 filed on 07/26/1995US Classes:63/32GEMExaminersPrimary: Milano, Michael J.Attorney, Agent or FirmForeign Patent References
International ClassA44C 017/00Foreign Application Priority Data1992-04-02 DEAbstractA diamond without plate is described, in which the facets of the upper part are more slanted toward the girdle level than the facets of the lower part. To create a diamond that, with the least possible quantity of material, gives one an impression of hardness and clarity when looking down on it, the angle between one of the equally large upper part facets and the preferably polygonal girdle level as well as the angle between one of the equally large lower part facets and the girdle level is chosen in such a way that seen from above, the girdle level appears in essentially homogenous, planar brilliance in which a central, shining star is imbedded.Field of SearchGEM | |
