Pharmaceutical tablets with diffractive microstructure and compression tools for producing such tablets
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United States of America Patent
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Mar 14, 2017
Grant Date -
Jun 10, 2010
app pub date -
Jun 12, 2007
filing date -
Jun 13, 2006
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Abstract
A tablet for pharmaceutical use has on at least one part of its surface a diffractive microstructure which generates diffraction effects which can be perceived in the visible spectral range and which serve as visual safety feature. The tablet includes a plurality of individual powder particles, where the diffractive microstructures are impressed into the surface of the individual powder particles. A compression tool to produce such tablets has on one pressing surface of the compression tool micro-structures, where the microstructures have dimensions which are smaller than the dimensions of the individual crystallites of the material of the pressing surface of the compression tool. The micro-structures of the compression tool can be produced for example by ion etching or by imprinting.
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