Examining a diamond
US5883388A · kind A · utility
10Cited by
5References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In order to test whether a diamond has had a layer of synthetic diamond material deposited thereon, infrared radiation including radiation of wavelength substantially 7 .mu.m to 25 .mu.m preferably 7 .mu.m to 10 .mu.m emitted or transmitted by the diamond is observed, to detect differences between the compositions of different zones of the diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.