EP Patent

EP0661045A1 — Sustained-release hydrogel preparation

Assigned to Astellas Pharma Inc · Expires 1995-07-05 · 31y expired

What this patent protects

A sustained-release hydrogen preparation comprising at least one drug, an additive for making water penetrate into the preparation and a macromolecular substance which forms hydrogel. It can nearly completely gel when it stays in the upper parts of the digestive tract, i.e. the s…

USPTO Abstract

A sustained-release hydrogen preparation comprising at least one drug, an additive for making water penetrate into the preparation and a macromolecular substance which forms hydrogel. It can nearly completely gel when it stays in the upper parts of the digestive tract, i.e. the stomach and small intestine, and can release the drug in the lower part thereof, i.e. the colon. The preparation enables the drug to be well dissolved and absorbed even in the colon, thus achieving a stable sustained-release effect.

Drugs covered by this patent

Patent Metadata

Patent number
EP0661045A1
Jurisdiction
EP
Classification
—
Expires
1995-07-05
Drug substance claim
No
Drug product claim
No
Assignee
Astellas Pharma Inc
Source
FDA Orange Book + USPTO grounding via Google Patents

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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