SECURITY DOCUMENT AND METHOD USING INVISIBLE CODED MARKINGS
摘要
An invisible indicia or encoded information is imprinted on a substrate using a compound which produces a fluorescence at a wavelength greater than about 650 nm when exposed to near infrared radiation. The information is covered by a layer of material that reflects or absorbs a substantial amount of the visible and UV radiation illuminating its surface.
申请公布号
WO9822291(A3)
申请公布日期
1998.10.15
申请号
WO1997US20342
申请日期
1997.11.05
申请人
EASTMAN CHEMICAL COMPANY;CYR, MICHAEL, JOHN;KRUTAK, JAMES, JOHN, SR.;CLAUBERG, HORST;HELTON, TONY, W.
发明人
CYR, MICHAEL, JOHN;KRUTAK, JAMES, JOHN, SR.;CLAUBERG, HORST;HELTON, TONY, W.