Patent · US Expired

Method, device and security system, all for authenticating a marking

US7067824B2 · kind B2 · utility

33Cited by

7References

17Claims

0Family size

Assignee

SICPA HOLDING SA · CH

Inventors

Edgar Müller · Fribourg, CH
Philipp Egger · Lausanne, CH
Myron Seto · Lausanne, CH

Key dates

Filing date	Apr 28, 2001
Grant date	Jun 27, 2006
Priority date	—
Expiry date	Dec 24, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG07D7/121
WIPO fieldControl
WIPO sectorInstruments

Abstract

A luminescent probe marking is excited with at least one excitation pulse of at least one excitation source. The probe intensity values of emission intensity from emission radiation of the luminescent probe marking are measured in response to the excitation pulse(s) at time intervals. A probe intensity-versus-time emission function is formed of the probe intensity values, and the probe intensity-versus-time emission function is compared with at least one reference intensity-versus-time emission function after the probe intensity-versus-time emission function and the reference intensity-versus-time emission function have been normalized.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.