Security Device Using Reversibly Self-Assembling Systems
OwnerAlan H. Goldsteininventor
Life of this patent
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Abstract
A security device having: a base having a pattern thereon; a mobile component disposed in contact with the base, the mobile component containing a plurality of reversibly adsorbable particles; and a cover attached to the base around the mobile component to maintain the mobile component in contact with the base; wherein the adsorbable particles are mobile and reversibly changeable between a first state where the adsorbable particles are adsorbed to at least a predetermined percentage of the pattern and a second state where the adsorbable particles are adsorbed to less than the predetermined percentage of the pattern.
Claims15
A security device comprising:
- a base having a pattern thereon;
- a mobile component disposed in contact with the base, the mobile component containing a plurality of reversibly adsorbable particles;
- and
- a cover attached to the base around the mobile component to contain the mobile component in contact with the base;
- wherein the adsorbable particles are mobile and reversibly changeable between a first state where the adsorbable particles are adsorbed to at least a predetermined percentage of the pattern and a second state where the adsorbable particles are adsorbed to less than the predetermined percentage of the pattern.
A method for making a security device comprising:
- forming a base with a pattern;
- coupling the base to a cover;
- injecting a mobile component between the base and the pattern through the cover, the mobile component comprising a plurality of adsorbable particles;
- and
- sealing the cover;
- wherein the adsorbable particles are mobile and reversibly changeable between a first state where the adsorbable particles are adsorbed to at least a predetermined percentage of the pattern and a second state where the adsorbable particles are adsorbed to less than the predetermined percentage the pattern.
Dependencies are inferred from the claim text.