Gem
US6422039B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Dec 11, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA44C17/008
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A gemstone has a faceted crown which is inclined with respect to the main axis and which is defined on the one end by a preferably flat table and on the other hand by a peripheral edge of the gemstone. A faceted pavilion is inclined with respect to the main axis, adjoins the peripheral edge, and converges to a tip. The facets (3) of the crown (2) are all inclined at the same crown angle (&bgr;) with respect to the main axis (1), while the facets (7, 7′) of the pavilion (6) are inclined at two different pavilion angles (&agr;1, &agr;2) with respect to the main axis (1). The first set of facets (7) of the pavilion (6) which are inclined at a first pavilion angle (&agr;1) extend to the peripheral edge (5), and the second set of facets (7′) of the pavilion (6) which are inclined at a second pavilion angle (&agr;2) start from the tip (8) without reaching the peripheral edge (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.