Patent · US Expired

Substrates secure against unauthorized copying and their production

US6303213A · kind A · utility

4Cited by

2References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Horst Berneth · Leverkusen, DE
Uwe Claussen · Leverkusen, DE
Rolf Richter · East Greenwich, US
Harro Traubel · Leverkusen, DE
Gunter Franke · Leichlingen, DE

Key dates

Filing date	Mar 29, 2000
Grant date	Oct 16, 2001
Priority date	—
Expiry date	Mar 29, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24934
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to substrates bearing visible information that is secure against unauthorized copying obtained by applying information in the form of combinations of at least one emitting colorant and at least one reflecting colorant that are selected to exhibit similar or identical hues when viewed, with no cognizance being taken of fluorescence, and are applied in such a manner that their color fields touch, wherein the color loci of the two colorants correspond to one of the trichromatic colors yellow, magenta, or cyan and the reflecting colorant is an organic or inorganic pigment.

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