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Bis-propyl amine analog and composition

  • US 20040152017A1
  • Filed: 11/17/2003
  • Published: 08/05/2004
  • Est. Priority Date: 06/17/2002
  • Status: Abandoned Application
First Claim
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1. A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of:

  • (a) molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar;

    (b) applying a transient optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of said optical reader to at least a position of said first major surface;

    (c) applying a reflective material over the first major surface so as to cover said information pits and information lands;

    wherein the transient optical state change security material comprises [7-(dipropylamino)phenothiazin-3-ylidene]dipropylamine.

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