The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1999
Filed:
Sep. 29, 1997
Applicant:
Inventor:
Thomas G Coleman, Pittsboro, NC (US);
Assignee:
C3, Inc., Morrisville, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01R / ;
U.S. Cl.
CPC ...
250372 ; 2503361 ; 356 30 ; 324 96 ; 324133 ; 324149 ;
Abstract
A target gemstone is irradiated with ultraviolet energy while sensing the electrical potential across the gemstone. A silicon carbide gemstone will generate an electrical potential and, therefore, can be positively identified, as distinct from other gemstones such as diamond and cubic zirconia that do not produce a potential.