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:
Dec. 29, 1998
Filed:
Aug. 29, 1996
Applicant:
Inventors:
Steven F Starcke, Rochester, MN (US);
Ronald H Kearnes, Rochester, MN (US);
Keven E Bennet, Rochester, MN (US);
David A Edmonson, Rochester, MN (US);
Assignee:
Azotic Coating Technology, Inc., Rochester, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A44C / ;
U.S. Cl.
CPC ...
428 15 ; 63 32 ; 427162 ; 427453 ;
Abstract
A faceted gemstone having at least one thin layer of material coated on the pavilion of a transparent substrate so that the body of the gemstone appears to have a different color. The color of reflected light changes hues when viewed through the face of the gemstone at different angles of observation. This causes the gemstone to appear to change color when the stone is tilted. The thin film is coated by low temperature techniques such as sputtering.