Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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US Patent 5657646 - Jewel having multiple culets
US Patent Issued on August 19, 1997
Estimated Patent Expiration Date:
October 4, 2014Estimated 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.
Estimated Patent Expiration Date:
October 4, 2014Estimated 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.AbstractA gem cut with crown facets and base facets has a table and a principal culet located along the longitudinal axis of the gem. In addition, at least one additional culet is provided between the end of the gem and the principal culet. Extending from the extra culet to the end of the diamond, at the girdle, is an end base facet. Preferably, the end base facet is at the 41° desired angle for diamonds. As so cut, the gem exhibits enhanced brilliance and the bow-tie dullness associated with side split facets is reduced resulting in overall enhanced brilliance to the stone. In the preferred embodiment of the invention, the girdle of the stone is provided with eight straight edges and the girdle is symmetrical about both the longitudinal axis and the perpendicular cross axis. In this embodiment, a pair of extra culets and end base facets are provided. According to the preferred embodiment of the invention, the end base facets are further provided with end base split facets for further enhanced brilliance. | InventorApplicationNo. 318058 filed on 10/04/1994US Classes:63/32GEMField of Search63/32, GEMD11/90FacetedExaminersPrimary: Milano, Michael J.US Patent ReferencesD196868, D277942, D340667, D340668, 4118949, Brilliantized step cut stoneIssued on: 10/10/1978 Inventor: Grossbard4118950, Brilliantized step cut stone with faceted crown Issued on: 10/10/1978 Inventor: Grossbard4306427, Chrysoberyl gemstones Issued on: 12/22/1981 Inventor: Urban4555916, Step-cut stone which has been brilliantized Issued on: 12/03/1985 Inventor: Grossbard4708001, Faceted gem cut from shallow gemstone material Issued on: 11/24/1987 Inventor: Alburger5462474Method of facetting a gem Issued on: 10/31/1995 Inventor: Hansen Foreign Patent References
International ClassA44C 017/00 |
