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Serving hundreds of leading biopharmaceutical companies globally:

Chinese Patent Office
AstraZeneca
Argus Health
Accenture
US Department of Justice
Daiichi Sankyo
McKinsey
QuintilesIMS
Farmers Insurance

Generated: April 26, 2018

DrugPatentWatch Database Preview

Details for Patent: 7,045,620

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Which drugs does patent 7,045,620 protect, and when does it expire?

Patent 7,045,620 protects XIFAXAN and is included in two NDAs.

This patent has eighty-one patent family members in thirty-five countries.
Summary for Patent: 7,045,620
Title:Polymorphous forms of rifaximin, processes for their production and use thereof in medicinal preparations
Abstract:Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin .alpha. and rifaximin .beta., and a poorly crystalline form named rifaximin .gamma. have been discovered. These forms are useful in the production of medicinal preparations for oral and topical use and can be 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 the addition of water at a determinate temperature and for a determinate period of time. The crystallization is followed by drying carried out under controlled conditions until a specific water content is reached in the end product.
Inventor(s): Viscomi; Giuseppe C. (Bologna, IT), Campana; Manuela (Bologna, IT), Braga; Dario (Bologna, IT), Confortini; Donatella (Bologna, IT), Cannata; Vincenzo (Bologna, IT), Severini; Denis (Bologna, IT), Righi; Paolo (Bologna, IT), Rosini; Goffredo (Bologna, IT)
Assignee: Alfa Wassermann, S.p.A. (Alanno, IT)
Application Number:10/728,090
Patent Claim Types:
see list of patent claims
Use; Process;

Drugs Protected by US Patent 7,045,620

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-001 May 25, 2004 RX Yes Yes ➤ Sign Up ➤ Sign Up Y Y ➤ Sign Up
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes ➤ Sign Up ➤ Sign Up Y ➤ Sign Up
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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Foreign Priority and PCT Information for Patent: 7,045,620

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
ItalyMI2003A2144Nov 07, 2003

Non-Orange Book US Patents Family Members for Patent 7,045,620

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

Patent No. Title Estimated Patent Expiration
8,404,704 Use of polymorphic forms of rifaximin for medical preparations ➤ Sign Up
8,158,781 Polymorphic forms .alpha., .beta. and .gamma. of rifaximin ➤ Sign Up
7,906,542 Pharmaceutical compositions comprising polymorphic forms .alpha., .beta., and .gamma. of rifaximin ➤ Sign Up
7,915,275 Use of polymorphic forms of rifaximin for medical preparations ➤ Sign Up
Patent No. Title Estimated Patent Expiration

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Serving hundreds of leading biopharmaceutical companies globally:

Express Scripts
Baxter
Covington
Federal Trade Commission
Argus Health
Cerilliant
Cipla
QuintilesIMS
Cantor Fitzgerald

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