Pharmaceutical tablets with diffractive microstructure and compression tools for producing such tablets
US9592646B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2007 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Nov 29, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2095
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.