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Method of tagging and detecting drugs, crops, chemical compounds and currency with perfluorocarbon tracers (PFT'S)

  • US 5,409,839 A
  • Filed: 11/01/1993
  • Issued: 04/25/1995
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Term
First Claim
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1. A method of tagging and detecting paper currency, said method comprising the steps of:

  • (a) applying a Perfluorocarbon Tracer (PFT) to said currency such that said PFT is released from said currency over a period of time as a vapor taggant; and

    (b) subsequently detecting the presence of said vapor taggant, and therefore said currency.

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