EP1331929A1 — Transdermal drug delivery system with improved water absorbability and adhesion properties
Assigned to Samyang Biopharmaceuticals Corp · Expires 2003-08-06 · 23y expired
What this patent protects
The present invention relates to an adhesive based transdermal drug delivery system, having excellent water absorbability, comprising a backing film, an adhesive matrix containing active ingredients and a release liner which is peelable prior to use. The matrix layer of the prese…
USPTO Abstract
The present invention relates to an adhesive based transdermal drug delivery system, having excellent water absorbability, comprising a backing film, an adhesive matrix containing active ingredients and a release liner which is peelable prior to use. The matrix layer of the present invention is a multilayered sandwich and comprises drug containing outer adhesive layers, adhering to the backing film and release liner respectively, between which is sandwiched an absorption enhancer layer. The adhesive layers comprise (a) an acrylate adhesive, (b) a mixture of high and low molecular weight polyvinylpyrrolidones, and (c) a colloidal silica.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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