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US 9,789,069 B2Granted
Authenticatable coatings for pharmaceutical tablets and ingestible materials
AssigneeSpectra Systems Corporation
InventorNabil M. Lawandy
Life of this patent
Estimating the term…
Abstract
An authenticable and machine readable coating for pills, tablets and other ingestible materials is provided. The disclosure also relates to methods of authenticating the same. The coatings are formed from a lattice of particles stacked to cause selective diffraction such that each pill or tablet has an optical signature. The signature associated with each coating can be read and authenticated. In one embodiment, the particles are substantially spherical and self-organized. In one embodiment, generally recognized as safe (GRAS) materials are used to form the particles.
Claims8
A coating for an ingestible material comprising:
- a substrate;
- a first coating applied onto said substrate said coating having a first plurality of substantially spherical particles suspended therein, the particles having a first dimension that equals a fraction of a wavelength that will satisfy a Bragg scattering condition, wherein the particles self-arrange during application to define a plurality of lattices that selectively diffract electromagnetic radiation and wherein each of the plurality of particles comprise a generally recognized as safe material.
Dependencies are inferred from the claim text.