Dry-powder film coating composition and method of preparation

Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing

Reexamination Certificate

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Details

C106S162900, C426S302000, C426S615000, C424S480000, C424S488000, C424S489000, C424S490000, C424S491000

Reexamination Certificate

active

06884288

ABSTRACT:
An edible dry-powder formulation of a film coating for pharmaceuticals and confectioneries using gum acacia as a low-cost film former is provided. A cellulosic polymer such as hydroxypropyl methylcellulose is used in addition to the gum acacia. A plasticizer such as propylene glycol is also added. The resulting formulation is a dry, free flowing powder that can be put into solution and applied to a tablet or other substrate without an extended waiting period. The resulting film coating is clear, shiny, durable and extremely economical. Because the formulation is a dry powder, it has along shelf life and low shipping costs.

REFERENCES:
patent: 3406031 (1968-10-01), Lee
patent: 3413400 (1968-11-01), Lee
patent: 4750938 (1988-06-01), Cottrell
patent: 5308647 (1994-05-01), Lappi
patent: 5591455 (1997-01-01), Signorino
patent: 6660302 (2003-12-01), Gayser et al.
patent: 2614020 (1977-10-01), None
patent: WO 9115548 (1991-10-01), None
patent: WO 9903449 (1999-01-01), None

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