Multi-layered microcapsules and method of preparing same

Details Multi-layered microcapsules and method of preparing same Multi-layered microcapsules and method of preparing same

2007-01-02

2007-01-02

Channavajjala, Lakshmi (Department: 1615)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

C424S489000, C424S497000, C424S452000, C424S463000

Reexamination Certificate

active

10161130

ABSTRACT:
A multi-layered microcapsule containing one or more active ingredients and process for preparing the same is disclosed. The multi-layered microcapsule comprises an inner solid microparticle core, typically composed of a biodegradable polymer, and having one or more alternating layers of polymer, active ingredient or polymer/active ingredient mixtures to produce a multi-layered microcapsule wherein the polymer or active ingredient in each layer may be the same or different or have the same or different concentration of the polymer or active ingredient in other layers.

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