Colored medicinal tablet, natural color pigment and method for using the pigment in coloring food, drug and cosmetic products
Patent 4274830 Issued on June 23, 1981. Estimated Expiration Date: 
June 23, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 23, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2085512 2925365 3054724 3162541 3475187 3576663 3802896 3922339 Color film coating of tablets and the like Dry water-dispersible pigment compositions Patent #: 4056402 InventorsAssigneeApplicationNo. 05/837301 filed on 09/27/1977US Classes:8/495, COATING OR SIZING WITH DYEING PROCESS OR PRODUCT424/401, Cosmetic, antiperspirant, dentifrice424/479, Containing polysaccharide (e.g., sugar, etc.)424/480, Cellulose or derivative427/2.2, Significant color or other intended appearance altering layer formed (e.g., shining, indicia)8/506, NONTEXTILE, DYEING PROCESS OR PRODUCT, INCLUDING INORGANIC FIBER8/524DRY DYE COMPOSITION OTHER THAN MERE MIXTURE OF TWO OR MORE DYES ALONE OR PROCESS OF MAKINGExaminersPrimary: Schofer, Joseph L.Assistant: Tungol, Maria Parrish Attorney, Agent or FirmInternational ClassA61K 9/28 (20060101)AbstractA 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.Other References
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