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Serving hundreds of leading biopharmaceutical companies globally:

Covington
Colorcon
Deloitte
Daiichi Sankyo
US Army
UBS
Argus Health
Farmers Insurance
Dow

Generated: April 23, 2018

DrugPatentWatch Database Preview

Details for Patent: 9,271,968

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Which drugs does patent 9,271,968 protect, and when does it expire?

Patent 9,271,968 protects XIFAXAN and is included in two NDAs.

This patent has thirty-one patent family members in twenty-six countries.
Summary for Patent: 9,271,968
Title:Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations
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.
Inventor(s): Viscomi; Giuseppe Claudio (Sasso Marconi, IT), Campana; Manuela (Bologna, IT), Confortini; Donatella (Calderara di Reno, IT), Barbanti; Maria (Bologna, IT), Braga; Dario (Bologna, IT)
Assignee: ALFA WASSERMANN S.P.A. (IT)
Application Number:14/262,612
Patent Claim Types:
see list of patent claims
Composition; Formulation; Dosage form;

Drugs Protected by US Patent 9,271,968

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 ➤ Try a Free Trial ➤ Try a Free Trial Y ➤ Try a Free Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes ➤ Try a Free Trial ➤ Try a Free Trial Y ➤ Try a Free Trial
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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Non-Orange Book US Patents Family Members for Patent 9,271,968

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
8,741,904 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
8,193,196 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
8,518,949 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
Patent No. Title Estimated Patent Expiration

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International Patents Family Members for US Patent 9,271,968

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2006222312 ➤ Try a Free Trial
Brazil PI0608073 ➤ Try a Free Trial
Canada 2594789 ➤ Try a Free Trial
China 1900077 ➤ Try a Free Trial
Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration

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Serving hundreds of leading biopharmaceutical companies globally:

Citi
Cantor Fitzgerald
McKinsey
Covington
Julphar
AstraZeneca
Argus Health
McKesson
Harvard Business School

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