Diamond marking
US6391215B1 · kind B1 · utility
5Cited by
27References
75Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Mar 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44B7/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by coating the diamond gemstone surface with an electrically conductive layer so as to prevent the diamond becoming charged, forming the mark with a focused ion beam, and cleaning the diamond surface with a powerful oxidizing agent to reveal a mark having an appropriate depth, which does not detrimentally affect the clarity or color grade of the diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.