Colored medicinal tablet, natural color pigment and method for using the pigment in coloring food, drug and cosmetic products
US4475919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1982 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Jan 6, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2866
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A pharmaceutical tablet consists of a substrate containing a medicament and may be covered with a coating, said coating including a pigment comprising a natural water insoluble edible powder dyed with an edible natural dye. The pigment for coloring the tablet, or other pharmaceutical products, as well as food and cosmetics, is made by suspending a natural water insoluble edible powdered substrate in an aqueous vehicle and dyeing the suspended powdered substrate with an edible natural dye. The liquid is removed to obtain the dry pigment powder of the invention which then can be suspended in a suspending medium and used for coating products to be colored such as food, drug and cosmetic products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.