CA Patent

CA2594789C — New polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations

Assigned to Alfasigma SpA · Expires 2010-09-14 · 16y expired

What this patent protects

Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin .delta. and rifaximin .epsilon. useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization process carried out by hot-…

USPTO Abstract

Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin .delta. and rifaximin .epsilon. useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization process carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by addition of water at a determinate temperature and for a determinate period of time, followed by a drying carried out under controlled conditions until reaching a settled water content in the end product, are the object of the invention.

Drugs covered by this patent

Patent Metadata

Patent number
CA2594789C
Jurisdiction
CA
Classification
—
Expires
2010-09-14
Drug substance claim
No
Drug product claim
No
Assignee
Alfasigma 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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