Patent · US Active

Retroreflective security features in secure documents

US8062735B2 · kind B2 · utility

38Cited by

14References

4Claims

0Family size

Assignee

L-1 SECURE CREDENTIALING, LLC · US

Inventors

Daoshen Bi · Boxborough, US
Robert L. Jones · Andover, US
Chris Collins · Lincoln, US

Key dates

Filing date	Apr 13, 2005
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Apr 20, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/25
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

Retroreflective material is used to create security features in secure documents. Retroreflective material in the document or sheets used for document creation is laser engraved to create optically variable images, identification quality grayscale images, different directional images viewable at corresponding angles of incidence, multidimensional images, and floating images. High refractive index glass beads are selectively applied to areas of a document surface using a variety of techniques. The beads may be applied in the form of a pre-determined or personalized pattern.

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