Process for incorporating a novel nuclear signature on currency which permits easy authentication at a later date
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United States of America Patent
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Apr 28, 1987
Grant Date -
N/A
app pub date -
Jun 17, 1985
filing date -
Jun 17, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new process for marking currency to permit easy and positive authentication at a later date comprising exposing a small region of the currency to bombardment by high energy neutrons for a short period, treating the exposed small region with a chemical reagent which reacts with the treated area to form tiny holes which can later be used for authentication. Also provide is a method for authentication which comprises exposing the marked currency to monochromatic X-rays, allowing the transmitted beam to impinge upon a fluorescent screen which will show shiny dots where the beam has reached the screen, said dots corresponding to the tiny holes in the marked currency.
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