EP0490305A2 — Microspheres for ophthalmic use
Assigned to Senju Pharmaceutical Co Ltd · Expires 1992-06-17 · 34y expired
What this patent protects
The object of the invention is to entrap a topical ophthalmic drug in a microsphere made of a high molecular compound, use it in the form of eye-drops, ophthalmic ointment, ophthalmic gel or the like, and thereby insure an effectively modulated release of the drug after topical a…
USPTO Abstract
The object of the invention is to entrap a topical ophthalmic drug in a microsphere made of a high molecular compound, use it in the form of eye-drops, ophthalmic ointment, ophthalmic gel or the like, and thereby insure an effectively modulated release of the drug after topical administration. Release of a drug is controlled by means of a microsphere made of a high molecular compound which dissolves or swells in a pH region approximating that of body fluids and containing the drug as encapsulated therein.
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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