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. 22, 1998
Filed:
Aug. 28, 1997
Applicant:
Inventor:
Gilbert Norman Ravich, Lawndale, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
250372 ; 250373 ; 2504611 ; 356 30 ;
Abstract
The detection of fractures in diamonds which are filled with high index of refraction glass is easily and quickly carried out by observation under ultra violet light. Such light having a wavelength between 300 and 400 nm, as reflected from, or transmitted through, such diamonds is imaged using a CCD camera, or directly by the use of fluorescent conversion to the visible spectrum. In either approach, the fracture fills are clearly and immediately distinguishable.