Gemstone and corresponding method of cutting
US7000607B2 · kind B2 · utility
6Cited by
5References
9Claims
0Family size
Inventor
Key dates
| Filing date | Mar 2, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Mar 2, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA44C17/001
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A gemstone having a crown, a girdle and a pavilion, wherein the girdle is shaped such that, when viewed in plan view, it is primarily bounded by four pairs of parallel straight edges. Three of the four pairs of edges are spaced by roughly equal spacing D1, while the remaining pair of edges is spaced by a spacing D2, wherein D2 is greater than D1 by between 10% and 40%. Also provided is a method for cutting such a gemstone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.