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. 08, 1992
Filed:
Jun. 19, 1991
Applicant:
Inventor:
Kenneth M Russell, Bethesda, MD (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 30 ;
Abstract
The invention relates to an apparatus for distinguishing cultured pearls from natural pearls by piercing the unidentified pearls with beams of light, preferably polarized, to reveal gross structural differences. The apparatus uses a light source, a polarizing filter, opaque shields, micro ports for light limitations, field magnifying lenses preferably 10.times.or 12.times., and slides and other positioners to hold pearls singly or in strings.
Russell, Kenneth. (1992). Pearl loupe (U.S. Patent No. 5146288). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5146288
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile