Controlled release compositions for interferon based on...

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form

Reexamination Certificate

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C424S490000, C424S070110, C424S085400, C514S021200

Reexamination Certificate

active

07867518

ABSTRACT:
The invention discloses a pharmaceutical composition for the controlled release of relatively toxic active compounds, in particular for bioactive proteins from the class of interferons. The composition comprises a biodegradable block copolymer constructed from poly(ethylene glycol) terephthalate (PEGT) and poly(butylene terephthalate) (PBT). The composition is provided in the form of injectable microparticles, of an injectable liquid which may have self-gelling properties, or of a solid implant. The invention further provides a pharmaceutical kit comprising the composition, methods for preparing the composition, and the pharmaceutical uses relating thereto.

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