EP0447168A2 — Long acting granular pharmaceutical composition
Assigned to Yamanouchi Pharmaceutical Co Ltd · Expires 1991-09-18 · 35y expired
What this patent protects
A long acting granular composition which comprises (a) a fine particulate nucleus composed of a water-insoluble substance; (b) a drug layer containing a drug which is difficult to prepare in long acting form and a non-swellable entero-soluble base; and (c) a drug-release controll…
USPTO Abstract
A long acting granular composition which comprises (a) a fine particulate nucleus composed of a water-insoluble substance; (b) a drug layer containing a drug which is difficult to prepare in long acting form and a non-swellable entero-soluble base; and (c) a drug-release controlling film containing a drug-release controlling material and an entero-soluble base. The long acting granular composition has a very satisfactory drug-release pattern and is free from the risk of abrupt disintegration in the digestive tract.
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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