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:
Feb. 24, 2004
Filed:
Aug. 14, 2002
Applicant:
Inventors:
Olivier Rozumek, St. Martin, CH;
Edgar Müller, Fribourg, CH;
Assignee:
SICPA Holding S.A., Prilly, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09G 1/00 ; C09K 1/700 ; C09D 1/100 ;
U.S. Cl.
CPC ...
C09G 1/00 ; C09K 1/700 ; C09D 1/100 ;
Abstract
The invention describes luminescent optically variable pigments (OVP), methods for obtaining such pigments, as well as the use of such pigments as security elements in inks, coatings and articles. The luminescence centers are preferably incorporated into the dielectric material of the OVP's optical<i>Fabry-Perot</i> resonance cavity, allowing for the machine-discrimination of luminescent OVP from simple mixtures of luminescents and non-luminescent OVP.