EP Patent

EP2208730A1 — Polymorphic forms of rifaximin, processes for their production and use thereof in medicinal preparations

Assigned to Alfa Wasserman SpA · Expires 2010-07-21 · 16y expired

What this patent protects

Crystalline polymorphic forms of rifaximin (INN), referred to as rifaximin α and rifaximin β, and a poorly crystalline form referred to as rifaximin γ, useful in the production of medicaments containing rifaximin for the oral and topical use and obtained by means of a crystalliza…

USPTO Abstract

Crystalline polymorphic forms of rifaximin (INN), referred to as rifaximin α and rifaximin β, and a poorly crystalline form referred to as rifaximin γ, useful in the production of medicaments containing rifaximin for the oral and topical use and obtained by means of a crystallization process carried out by hot-dissolving the raw rifaximin in ethyl alcohol and causing the crystallization of the product by addition of water at a fixed temperature and for a fixed period of time, followed by drying under controlled conditions until reaching a precise water content in the end product, are the object of the invention.

Drugs covered by this patent

Patent Metadata

Patent number
EP2208730A1
Jurisdiction
EP
Classification
—
Expires
2010-07-21
Drug substance claim
No
Drug product claim
No
Assignee
Alfa Wasserman SpA
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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