Retrochromic articles

Details Retrochromic articles Retrochromic articles

2006-05-02

2006-05-02

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Signal reflector

Including a curved refracting surface

C359S542000

Reexamination Certificate

active

07036944

ABSTRACT:
Retrochromic articles have a retrochromic pattern comprising first and second viewable retroreflective regions, wherein at least one viewable retroreflective region comprises a plurality of intrinsically retrochromic beads. Methods for making such articles are also provided. Articles according to the present invention have covert security features, and may be used, for example, to authenticate security articles.

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