EP0294103A1 — A sustained-release preparation and production thereof
Assigned to Takeda Pharmaceutical Co Ltd · Expires 1988-12-07 · 37y expired
What this patent protects
The present invention concerns a sustained-release microcapsule preparation comprising an ion exchange resin with 6 to 16% crosslinking, containing a drug adsorbed to not less than 80% of its theoretical ion adsorption amount and coated with a water-permeable polymer. The s…
USPTO Abstract
The present invention concerns a sustained-release microcapsule preparation comprising an ion exchange resin with 6 to 16% crosslinking, containing a drug adsorbed to not less than 80% of its theoretical ion adsorption amount and coated with a water-permeable polymer. The sustained-release preparation of this invention contains a high concentration of an absorbed drug: it shows neither cracking nor breaking in its coat and exhibits good sustained-release properties which enhance its dosage form design and makes it easy to take.
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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