Methods, apparatus, and systems for evaluating gemstones
US7336347B2 · kind B2 · utility
18Cited by
19References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Mar 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods for grading gemstones, apparatus for grading gemstones, and systems that utilize such methods and apparatus, specifically methods which trace rays through a computer representation of a gemstone wherein the rays enter the gemstone though the gemstone crown and allow a grade to be assigned to the gemstone represented based on the ray paths through the representation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.